Quote:
Originally Posted by BrianG
Some one should have told him that he was wasting his money. 7,000 between oil changes no problem, and I'd bet it would have looked the same inside. I use synthetic and push it over 10,000 most of the time. I could be wrong, but I think the recommended is some where around 7,000 now. 3,000 miles was a good number when poorly running engines used gas guzzling carburetors and the oil was of much poorer quality. 185,000 plus miles on my wife's and my vehicles and they run like new. Fuel injection with every point along the way monitored and adjusting the motor to run cleanly and efficiently is a very big reason why these vehicles can get 300,000 plus miles between rebuilds.
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I don't doubt that the oil change interval has the potential to be longer, but I have yet to see any information supporting the claim, ie: a test between two engines, one with oil changed at 3000 and one changed at 7000 to identify the wear differences, if any.
Oil companies would obviously love for us to use a minimum interval, because it's good for their business. Likewise, automotive manufacturers could potentially stress a longer duration between because it makes their vehicles seem tougher, and if there were issues, they'd bank on you fixing it at the dealership.
Like I said, I can't confirm or deny any claims made by any manufacturer without a 3rd party test from an entity that isn't benefiting from the information.
One thing is for sure, no one has ever had issues due to too many oil changes!