FYI: '13'-15 just calls for 80W-90 for rear diff & transfer which is a lot cheaper. I used a synthetic Amsoil and since I plan to change every 25-30K miles I don't think I would really get much benefit out of the SG1 in my '15.
I certainly can't dispute either way if it is better or worse. Unfortunately not a lot of info about this oil including the weight. I am comfortable with the protection my Amsoil is giving me.
I would be most concerned about those that haven't changed fluid since mine was apparently in an under-filled condition on rear diff and this area being prone to heat build-up I wouldn't want a low fluid condition for that matter alone. I remember a thread here somewhere where someone even overheated it playing in the snow.
EDIT: There is a heat sensor tied into the rear diff.
I like getting myself to a known state with fluids and levels.
I would have two on hand... my front transfer was spot on but the rear diff took around 2/3 quart IIRC
Oddly, a few weeks ago I went to order the mazda 80w90 and it was out of stock and backordered. And had been for a minute. I wonder if they were doing some change to it considering it's not listed for the new cx5s
I ordered some of the Mazda SG1 oil specified for my CX-5 and I was just now reading the warning on the back of the bottle.
It seems that this oil contains Tricresyl phosphate and you shouldn't drink it. Good to know.
I didn't know what Tricresyl phosphate was so I looked it up.
Some type of friction modifier it seems. Nasty stuff.
My guess is the Mazda SG1 is just Amzoil or Redline 75w-90 synthetic, or a similar.
I gotz ya 'long life' oil rights here! lol (probably be ok though)
Last edited by ctbale; 01-16-2017 at 11:43 PM.
I finally crawled under my CX-5 and checked the rear differential fluid. I had to add ~4oz to bring it up to the correct level.