Question is, why would a dealer recommend conventional, especially on a turbo? Dealer should just say the truth. Conventional is standard, synthetic is an optional upgrade.
Sadly, you can't trust dealers for almost anything. It's all about making money for them, after they sell you the car. I am not talking Mazda specific. It happens across the board.
The very few times i've taken my cars to local dealers for some type of work, i have caught them lying or exaggerating more than once.
One should do their own research, as much as possible. It could be time consuming and often frustrating, but it's worth it at the end of the day.
>> At the very minimum, READ your user manual that came with the car. All the basics are spelled out there, and the info came from the company that made the car, Not a profit hungry dealer service department.
If at all possible, do your own basic maintenance. It is a lot easier than many people think. Modern cars are easy to maintain when it comes to stuff like oil changes, filters, coolant and even brake pads.
You save a TON of money, and most importantly, you know exactly what parts/fluids go in your own car.
Next best option will be to find a trusted, highly rated independent mechanic. For routine maintenance tasks, you don't need a fancy, expensive repair shop. There are some good people out there who are honest and educated, who can keep your car in top shape for decent cost.
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