Date: Wed, 26 Sep 2001 02:57:00 GMT From: Bob <burkhartnopsamnet> Subject: Re: Does anyone use synthetic oils?
"ajames" <ashleynopsamifi.co.uk> wrote in 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>>>>>>>>>> I use mobile 1 in 3 saabs (2 w/ nearly 300,000 miles - original engines never worked on) and my Landcruiser (155,000). Never had a problem w/ any of engines except timing chains on two Saabs at about 150k. Even at 300K miles, No smoke from engines, Valves never had a problem, use about 1 quart per 2000 to 3000 miles. I only change the oil about once per 12000 miles. I'm sold - I'll never use anything else in my cars. >> >> > >