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      10-15-2022, 04:27 PM   #24
donm527
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Drives: Chevrolet Z06
Join Date: Sep 2022
Location: Tampa Bay/South Florida

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Was wondering what oil the dealers are required to use on oil changes? Full synth or blend?

I have done all my oil changes on all my vehicles from Mustangs and Z06 and Kawasaki ZX-7 to Honda Odyssey and always user Mobil1 Full synthetic.

I would use the factory oil until at least the recommended first change interval because it's usually not full synthetic cause in past you don't want to break in a new engine with full synthetic. But if they regularly use a blend then I definitely won't be taking in my car for oil changes. Over 30 years of using Mobil1 and my current daily with over 320k in 11 years.

When I was into bikes, they would say drain and change at 500 and/or 1k because that's when you have the most metal in the oil because parts are mating. Maybe overkill but I love working under the hood anyways and 5 qt jugs of Walmart and filter is cheap insurance.

Do manufacturers even use "break-in oil" in their engine oil?

Quote:
Originally Posted by XC3LLR8 View Post
Ahh, makes sense. However, I doubt I'll ever take advantage of the free oil changes.
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