Date: Sun, 16 Sep 2001 01:43:22 GMT From: "david crummack" <dcrummacknopsamin.rr.com> Subject: Re: Does anyone use synthetic oils?
To answer the subject question. Yes. My experience with mobil 1 is that it can leak through seals on cars with several years of milage on regular oils. When i change the oil it's still as dirty as when I had conventional oil in the engine. no oil can turn back the clock or improve an engines mechinics. All it can do is remain stable for longer and provide the protection against wear that you need. I've switched to redline and I'll stick to it simply out of ignorance. I don't know that it'll help maintain and prolong the life of my engine, but..... "ajames" <ashleynopsamifi.co.uk> wrote in message news:tq778to9ecqp47nopsam.supernews.com... > Rolls Royce recommend Esso Ultron synthetic oil for all their cars that have > had an engine rebuild. They say that, as a result, the engine may never > require another re-build. They do not recommend it for pre war cars that > have not had a rebuild. Those who are interested should obtain technical > bulletin no. 5 from the club shop and read what the company's chief engineer > has said together with some oil company chemists. > > BMW also recommend it Mobil 1 synthetic for all their cars having tested a > 3.25i for 1,000,000 miles and found the engine still within tolerance. > > Appropriately used synthetic oils do have substantial advantages over > conventional ones. Do not listen to anecdotal "evidence" contact > manufacturers of the oil and the vehicle manufacturers to find out the > facts. > > The only warnings against synthetic oil are that it might dissolve early > rubber oil seals and that it is inadvisable in older engines where the oil > pump is much above the oil and may have difficulty priming with thin oil. > > Ashley James > Turbodave <yeahnopsamt.com> wrote in message > news:Apz77.54899$Mb7.1782728nopsam.direct.ca... > > First off , sorry about the HTML , I actually sent it in plain text but it > > ended up changing somewhere !!??. > > I can not remember the brand I was using, it was quite a few years ago. > > When I talked to the guy at Crower he did not mention anything about > brands > > either. > > After two cams wearing out , I did not push the issue, just switched to > > standard oil. > > Just a note , it could have alot to do with the Rockwell hardening of the > > cam lobes as apposed to the roller, if they are too far away from each > other > > in hardness it could excelerate the problem, I know the rollers on the > Fords > > are really hard. > > If you have a roller cam, and have the motor apart in the future it is > > worth a close inspection of the cam lobes to be on the safe side. > > Dave. > > > > > > life_speednopsamo.com wrote in message ... > > >Interesting story. Were the roller cam problems from one particular brand > > of > > >oil? I know Redline synthetic is commonly used in race applications > > >including roller cams, but I've not heard of problems. > > > > > >- Lifespeed > > > > > >In alt.autos.turbocharged Turbodave <yeahnopsamt.com> wrote: > > > > > >: Well while we are on the subject I learned the hard way that = > > >: synthetic oil is actually to slippery in some cases as in on roller = > > >: camshafts, I was having trouble with wiping out the lobes in a short = > > >: period of time, finally got the answer from the guy who machines my > race > > = > > >: motors/ and then backed up by one of the tech people at Crower.. , it > is > > = > > >: so slippery that the roller on the lifter will not turn as it is going > = > > >: up the ramp for a short duration, the reason is the inside pin on the = > > >: roller has a higher friction no. than the outer part of the pin that = > > >: touches the cam lobe creating this skid area eventually wearing out the > = > > >: lobe. > > >: Just something I have come across, I also feel that a turbo with = > > >: anything less than perfect seals is more likely to leak with synthetic. > > >: Just my opinion on the latter part though. > > >: Dave . > > > > > > > > >>>>>>>>>>BIG HTML SNIP>>>>>>>>>> > > > > > >