Date: Mon, 1 Apr 2002 12:08:42 +0100 From: "Grunff" <grunffnopsam.com> Subject: Re: Mobil 1 = Oil Leak?
"Henrik B." <saabnopsamlixnet._nospam_dk> wrote in message news:B6Xp8.6378$iY5.274899nopsam010.worldonline.dk... > "Grunff" <grunffnopsam.com> skrev i en meddelelse > news:3ca83219$1_1nopsam2.vip.uk.com... > > > Yup, I've experienced teh same thing in the past. As Henrik says, it's > > because the synth cleans the insides, around the seals, very effectively. > > But there's also some evidence that it causes shrinkage in seals which > have > > been immersed in mineral oil for many years. > > I must add that the "shrinkage"-problem used to be! They've worked on the > oil, so the problem shouldn't be there anymore. > > > My recommendation is don't switch from dyno to synth on an older car, > unless > > you've rebuilt the engine, or are prepared to change several seals > > (particularly crank seals). > > I've used Mobil 1 fully synth for years now. On all the three Saab's I've > had and never experienced leak prob's. First Saab was a 99 with over 300k > km, the second was an '85 900 T16 with over 200k km and my current 9000 with > 250k km on the clock... > > Cheers! That's interesting. I've done the switch on 2 saabs, a 1987 9kt, 140kmiles, and a 1986 90016vT. Switched from ??? mineral to Mobil1 fully synth, both a couple of years ago. Had immediate leakage problems on both cars, but much worse on the 9k, to the point where I had to change the crank seals in order to carry on driving it. This was all within weeks of switching oil. Given the hassles I've had in the past, I wouldn't do it again. I am very pro-synth, it's a much better product. Especially important on turbo cars. However, I'm not sure that the advangages outweigh the possible consequences in the case of older cars. Grunff
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