OT - synthetic oil

P.S. The truck is a '98 Chev with 7.4L Vortec gas engine. Verified odometer reading is 24,000 miles.

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.

• synthetic oil-isn't

• Mobil 1 site

Concerning the low mileage on your truck. I really wouldn't worry about a dealer turning the odometer. The number of crooks that actual do that are few and far between. The penalty is very stiff and not worth the effort. There are plenty of other ways dealers make thier money.

Dug

I worked in car sales at a Pontiac/Olds dealer for a couple of years and I never saw any odometer altering at that dealership. There may still be some of that going on at the smaller fly-by-night corner lots, but I doubt it happens much at a major dealership.

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You could go 15,000 probably as long as you oil sampled to get to that point - you could also go 2000 and not have anything to worry about, but thats crazy. Mobil has oil now that is good for 15k or once a year. My question then becomes, what do you use for a filter?

Your filter better be able to stand those miles OR you must change it in between times of changing oil. Don't spend $5 per quart for oil and $1.99 for a filter.

Sorry, I know there is no answer here, I just want to throw in some food for thought.

As far as filters goes, the standard 'ol Fram is the best...no joke. Look at their boxes, what they claim is right(I've worked in the lube filter world and have done competitive testing on them). The 99% multi pass efficiency measured via the J1589 test spec on their Tough Guard filters is right on and is the industry's best.(J1589 is the standard test for all spin on lube filters) $10 amsoil filters won't even come close in terms of performance. In short, buy the Fram Tough Guard filters, and you will have the best spin on filter avaliable.

OIL!!! Boy can I smell the opinions forthcomming.