Quote:
Originally Posted by Wormius
You believe all of this, but the possibility of oils being better is a bridge too far?
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Of course oil's are a little better, nobody is doubting that. I have used synthetic oil in a lot of cars for a long time but how much better are they really compared to ones 10-15 years ago of the same brand/viscosity?
If we take 4 cylinder and V6 Honda's and Toyota's of which there are tens of millions of them around. A lot of them called for conventional or synthetic oil. 10W30, 5W30, 5W20 and called for approx 6k km's oil change intervals under what the majority of people would be severe conditions.
Fast forward to more modern Honda/Toyota cars with minor modifications to their engines as the engine family's are not radically different. Now all of a sudden it's a thinner oil viscosity and a 16k oil change interval. There have been some changes in oil/engine tolerances for sure but is it 250-300+ % ?
After your warranty period goes at 100k, who's paying the bill? When automakers/parts makers say lifetime fluids, lifetime is defined as how long? When a coolant maker says "Guaranteed for 15 years and 500k km's" what loophole will they use when that stuff goes acidic, eats everything, rusts out your engine and more? Might refund your $24 bottle back if your lucky.
Anyhow people are free to maintain their cars as they see fit.