Re: OT - synthetic oil

Posted by RusselAZ on May 07, 2005 at 22:03:11 from (67.136.106.183):

In Reply to: OT - synthetic oil posted by Jim.UT on May 07, 2005 at 11:11:48:

All the opinions and discussion about synthetic oils reminds me of the same discussions that went on when radial tires began to show up. The old coffee shop rumors die hard.

If every gas powered RV had synthetic oil in them I doubt I or anyone else would ever need to replace the engines in them. The diesel pushers are in a different class and I service them with either Rotella or Delo whichever the owner wants.

The biggest reason, (HUGE) that engiens and oils last longer is because of Fuel injection. In a well tuned fuel injection engine the old bygone condition of gasoline deluting the oil and filling it with carbons is gone. Recently we took the heads off a 96 Jeep with the 5.9 in it with around 200,000 miles on it. The hone marks were still on the cylinder walls. And that was with regular oil and TLC vehicle care.

Synthetic oils will do and protect things that regular oils can't even dream of. However, these talents show their true colors at the extreme of conditions. At normal conditions there isn't a lot of difference. One of the extremes is how long you can run the oil. I have ran synthetic oils since 1976 and they are wonderful at 30 below and 400 above. A few years ago I had the cooling screen plug on a briggs engine and I was running it at 3600 RPM running a compost grinder. I burned the paint off the upper area of the crankcase but didn't hurt the engine or the oil from what I could tell. It was an aluminum bore engine. I took the head off and looked,,knowing it would be scored. It wasn't. Put it back together and it is still running like new. Extremes is where it shines.

I run synthetic with Napa gold filters for 6000 to 8000 miles depending on when I think about checking. Sometimes longer.

At least, double the change interval and enjoy the peace of mind. Lucky you finding that truck. Congrad's.

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