Rust-proofing (Krown) question

A

akaeleven

Member
:
2017 CX-5 GT
So I read this quote from 2013 when I was doing research.

MikeM. said:
The CX-5 is a thoroughly modern car in it's design and manufacture. It has some of the best rust protection in the business including a dual layer galvanization process on panels (dual layer of zinc coating). No further rust proofing is necessary or desirable and drilling through body panels penetrates the zinc coatings which are applied to stop rust from starting. Plus it's an unnecessary expense that adds weight and risks plugging the drain holes which could stop the salty road spray from draining as designed. Just hose it off with plain water periodically if you are concerned you have been in extra corrosive conditions and save the coatings for poorly protected cars without zinc under coatings like most cheap cars from decades past.
Click to expand...

So I guess I'm looking for CX-5 owners from 2013 to 2016 who did NOT do any rust proofing.
Are you guys seeing any major rust yet?
 
2015 here.

I did get the recall for the lift gate but no rust that I can see.

I probably live in one of the foggiest places on the planet, except between 10AM and 3PM, then it's usually windy and foggy.
 
No rust on mine, but I didn't expect any. I would skip the extra 'rust-proofing'. Does more harm than good unless it is applied perfectly.
 
Rust will take a while to start on any modern car unless there's a defect or paint penetration. From my experience 6-8 years depending on care, exposure, evironment, etc.

Rust treatment if in Canada is about preventative maintenance. Not one of those things you have to do, but one of those things that helps keep your car healthier longer - especially in the longer term.

If you don't plan on keeping for more than 5-6 years or are leasing don't even bother. If you plan on keeping 7/8 years or longer its up to you if it's worth it or not.

I'm in southern Ontario, Canada. Before buying our first new cars my previous cars were all bought used, mostly around 4-6 years old (older when I was younger, newer as I got older). In all but my last 2 cars rust was starting somewhere around the 2nd winter I had it.

In the last 2 cars that didn't rust 1 was treated since new and I continued on with the treatments. The other I treated the day I got it at 4 yrs / 72,000 kms and continued on until it was smashed at 7 years / 145,000 kms with no rust.

All cars will get the typical surface rust on the underside, though the car treated from new was certainly better off in that regard.

Our new 3 and CX-5 are both being treated from new.
 
I have never used Krown, but being in Canada in a snow and salt belt, I have always oil sprayed my vehicles.
I have been doing this for over 30 years, on many vehicles, so I can tell you with 100% accuracy that oil spraying works.
I tend to keep my vehicles a long time (12-15 years), and most of them showed almost no rust after that time.
The other benefit to oil spraying is that it keeps the mechanicals under the car in better shape over a longer period of time.
I do a lot of my own maintenance, and I hate getting under a rusty car, trying to loosen seized/rusted nuts and bolts.
It also helps reduce squeaks and rattles, and keeps my doors from freezing up in winter.
 
Buzzman12 said:
I have never used Krown, but being in Canada in a snow and salt belt, I have always oil sprayed my vehicles.
I have been doing this for over 30 years, on many vehicles, so I can tell you with 100% accuracy that oil spraying works.
I tend to keep my vehicles a long time (12-15 years), and most of them showed almost no rust after that time.
The other benefit to oil spraying is that it keeps the mechanicals under the car in better shape over a longer period of time.
I do a lot of my own maintenance, and I hate getting under a rusty car, trying to loosen seized/rusted nuts and bolts.
It also helps reduce squeaks and rattles, and keeps my doors from freezing up in winter.
Click to expand...
Interesting. How do you oil spray your car? What oil do you use?
 
I don't do it myself.
I've used an independent guy for the last 20 years here in Ottawa.
I've also used Metropolitan rustproofing.

They drill holes in some parts of the car to get the oil in the doors, pillars and sills. The holes are then covered by small plastic plugs.
I've heard people criticize the hole drilling technique, mostly because they think the edges of the holes will rust.
The technicians always put a small dab of grease or oil on the plastic plug, and I've never had any holes rust out.
The only negative thing I have is working in the engine bay.
They spray oil in and around the inner fenders under the hood, and it gets kinda greasy/dirty under there.
Makes for dirty hands and arms when doing any engine work.

As for the actual oil that's used, it's definitely not old engine oil, like some cheap fly by night outfits use.
Stay away from those guys. Engine oil is not good for rustproofing.
The oil is thicker than engine oil, and is actually more of a vegetable oil than dinosaur oil.
The oil is applied hot, so that it runs/flows into the crevasses of the car. It solidifies to almost a molasses kind of viscosity, and doesn't drip after 24 hours.
 
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It's done the same way as Krown. Krown is just a brand here with their own formula. And you get a shop to do it for you.

They drive your car up onto a drive on lift, lift it up, and shoot all exposed areas on underside and engine bay / firewall / etc.

Some places go a step further and get into fenders / bumpers / bumpers / hidden areas by "fogging" with specialized tips / nozzles for their spray guns through plugs and openings existing in panels from the factory.

Some places go another step further and drill into otherwise inaccessible areas to allow fogging / coating of internal panels. If it's your first time spraying or the vehicle hasn't been "drilled" before they will ask for authorization to do this - which you can refuse. They will simply limit their application to the accessible areas.

If they drill, they treat / seal their holes and re-use the same hole for each subsequent treatment.
 
Buzzman12 said:
I don't do it myself.
I've used an independent guy for the last 20 years here in Ottawa.
I've also used Metropolitan rustproofing.

They drill holes in some parts of the car to get the oil in the doors, pillars and sills. The holes are then covered by small plastic plugs.
I've heard people criticize the hole drilling technique, mostly because they think the edges of the holes will rust.
The technicians always put a small dab of grease or oil on the plastic plug, and I've never had any holes rust out.
The only negative thing I have is working in the engine bay.
They spray oil in and around the inner fenders under the hood, and it gets kinda greasy/dirty under there.
Makes for dirty hands and arms when doing any engine work.
Click to expand...

Beat me to it while typing.

Yes! Good for car, but makes for messy / wrenching. Worth the hassle & mess though IMO
 
I'm really not comfortable with Krown drilling holes on the doors.
But if they don't drill holes, they won't place my car in some sort of Krown warranty.

Anyway, I went ahead and cancelled my weekend appointment with Krown.
I'll check back in 3 years (also 6 years) and report if there's any rust on my '17.

Thanks for all the replies!
 
Only anywhere a chip occurs, then the car rusts immediately. I try to fix the chips every week or three, but I have never really caught them before rusting, so I have to scratch the rust off, then paint over with the pin. I did not respect Japanese metal or paint very much before this CX5, nor has it changed my mind one bit.
 
akaeleven said:
I'm really not comfortable with Krown drilling holes on the doors.
But if they don't drill holes, they won't place my car in some sort of Krown warranty.

Anyway, I went ahead and cancelled my weekend appointment with Krown.
I'll check back in 3 years (also 6 years) and report if there's any rust on my '17.

Thanks for all the replies!
Click to expand...

You shouldn't be worried about any holes drilled into the door / rocker panels. They are very small and covered with a rubber type grommet.
It's the only way to ensure that the product can work and cover those hard to reach areas in the car. Rust has already begun on your car - rustproofing just
slows down the chemical reaction and is definitely worth it if you are going to keep the car for more than three years or so. Also, it is worth doing especially here in Canada with our brutal Winters and salt / brine covered roads.

If you open any one of your passenger doors right now you will notice two holes that are already present and covered which are for 'draining' purposes from the factory.

I already checked with Mazda of Canada and the small holes drilled into the body do not effect your manufacture warranty. That being said if you do ever have a claim regarding rust on the vehicle you would probably need to hire a lawyer, as with most car companies they cover themselves in the fine print. Mazda even wrote in their reply to me that they don't even recommend rustproofing their vehicles! So why is it that most Mazda dealerships try and sell you a rustproofing package of some type?

Bottom line is that it's such a small investment (about $130 yearly) which can make such a big difference in the long run.
 
JasconC said:
You shouldn't be worried about any holes drilled into the door / rocker panels. They are very small and covered with a rubber type grommet.
It's the only way to ensure that the product can work and cover those hard to reach areas in the car. Rust has already begun on your car - rustproofing just
slows down the chemical reaction and is definitely worth it if you are going to keep the car for more than three years or so. Also, it is worth doing especially here in Canada with our brutal Winters and salt / brine covered roads.

If you open any one of your passenger doors right now you will notice two holes that are already present and covered which are for 'draining' purposes from the factory.

I already checked with Mazda of Canada and the small holes drilled into the body do not effect your manufacture warranty. That being said if you do ever have a claim regarding rust on the vehicle you would probably need to hire a lawyer, as with most car companies they cover themselves in the fine print. Mazda even wrote in their reply to me that they don't even recommend rustproofing their vehicles! So why is it that most Mazda dealerships try and sell you a rustproofing package of some type?

Bottom line is that it's such a small investment (about $130 yearly) which can make such a big difference in the long run.
Click to expand...
I have to agree. If you intend to keep your car for any length of time (in snowy, salty Canada), then get it done.
They don't drill that many holes, and they are not intrusive. All my cars were drilled, and I don't even notice it. It's not an issue.
I always had my cars sprayed in years one and two, and then shifted to every second year after that.
As an example, my 2002 Pathfinder has 310,000 kms. on it, and the undercarriage is still black.
The only thing oil spraying won't prevent from rusting is the exhaust system. Darn.
 
Rust never sleeps. Rust proofing should be done at the factory. This was a huge scam in the 80's. Adding rust proofing after the fact is just temporarily hiding what's already started. Plenty of articles on this debate.
 
Heritage07 said:
Rust never sleeps. Rust proofing should be done at the factory. This was a huge scam in the 80's. Adding rust proofing after the fact is just temporarily hiding what's already started. Plenty of articles on this debate.
Click to expand...
You're right, rust never sleeps. Corrosion on bare metal starts the second it is formed, we get that,
but adding rustproofing "after the fact to temporarily hide what's already started" is better than just letting it rot from day one, especially in our harsh Canadian environment.
I don't know what your experience is with rustproofing, but I've been using some sort of rustproofing on my cars since the 80's, and I can tell you first hand what works, and what is a scam.
Tell us about your experiences.
 
I've been spraying wax under my new cars for years and they still look new when I get them back. The rhetoric going on that it does no good is not correct in my opinion. For instance, the fuel filler pipe on RAV4 s are known to corrode through any time after 6 or 7 years and they are hellish expensive. This was my CX-3

IMG_1330.jpg


This is the fuel pipe on my 17. The arch liner is easy to get off,

IMG_3530.jpg


IMG_3535.jpg



And this is the rear suspension on the same car.....

IMG_3529.jpg
 
Buzzman12 said:
You're right, rust never sleeps. Corrosion on bare metal starts the second it is formed, we get that,
but adding rustproofing "after the fact to temporarily hide what's already started" is better than just letting it rot from day one, especially in our harsh Canadian environment.
I don't know what your experience is with rustproofing, but I've been using some sort of rustproofing on my cars since the 80's, and I can tell you first hand what works, and what is a scam.
Tell us about your experiences.
Click to expand...
In the US back in the 80's dealers would try to sell you rust proofing and undercoating as additional add ons to the sale. Both consisted of spraying underneath the car. I had two identical Ford escorts, one was an 83 and the other an 84. I fell for the rust proofing crap on the 84. Both cars rusted in the exact same places during my 10 year ownership of each car. All I was trying to say is spray on rust proofing is a dealer scam.
 
I wouldn't expect a modern car to fall apart but they do surface rust and some light metal parts can suffer badly.
 
akaeleven said:
I'm really not comfortable with Krown drilling holes on the doors.
But if they don't drill holes, they won't place my car in some sort of Krown warranty.

Anyway, I went ahead and cancelled my weekend appointment with Krown.
I'll check back in 3 years (also 6 years) and report if there's any rust on my '17.

Thanks for all the replies!
Click to expand...

As I mentioned they will still do the job, just NOT drill the holes if you don't want them

Krown actually has a decent warranty when you get it done on a new car - however you have to meet the requirements.

No rust-thru is gauranteed below the belt line for the life of the car as long as you get it treated within 12 months of manufacture, within 6 months of you buying it (it being on the road) and annually +/- 30 days of your anniversary. If you do that you have a life-time rust warranty.

They can't warrant against rust if you don't allow them to spray in an area that they can't get into without drilling. That's why there's no warranty without drilling - but as the vehicle owner that's entirely your decision to make.

This also reminds me... I gotta get off my rump and get our's booked in.
 
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