Quote:
Originally Posted by gmercoleza
I don't think cost is the issue. I think the purpose of the reports is to objectively determine the potential effects of changing oil at various intervals. He's basically being the guinea pig for the rest of us.
I have always thought synth oil at a 10,000 mile interval or dino at a 5,000 mile interval would be fine. Now I am convinced of it.
3,000-mile oil change intervals appears to be for severe-duty vehicles only.
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I had my wife's 98 Avalon's oil sent out to Blackstone when using M1 5w30 Synthetic at around 5500 miles. They recommended a 5k change so I switched back to dino M1 5w30 and am shortening the interval to 4k. The large extra cost for syn didn't seem worth it to me if I couldn't run any longer OCIs. I had the same logic in my mind when switching the Avalon over to syn but it seems her car can't do 10k OCI.
To reply to Kenny, the report costs roughly the same as one oil change. So say you get a report and they tell you that your car can run another 2k miles per oil change. You will make up the cost on the report pretty quickly (this assumes you own the car for several oil changes). If one can indeed run a 17k OCI and you were changing it out at 5k, that is 2.5 oil changes you just saved in money and hassle of the oil change, so no it does not necessarily cost more to get an analysis. In my case it did but I will no longer run synthetics in the wife's car.