dpepper Posted April 27, 2003 Share Posted April 27, 2003 does anyone have any opinion or reason why i should NOT use the Castrol RS 0/40 oil in my supe ? cheers Quote Link to comment Share on other sites More sharing options...
Guest Martin F Posted April 27, 2003 Share Posted April 27, 2003 It's a bit too thin really. You can use it but a 5w-40 or 10w-40 is a bit better suited. Quote Link to comment Share on other sites More sharing options...
Alex Posted April 27, 2003 Share Posted April 27, 2003 Castrol RS 10w60 would be a better bet. As MatinF says 0w is too thin. The oil can get past seals if its too thin Quote Link to comment Share on other sites More sharing options...
dpepper Posted April 27, 2003 Author Share Posted April 27, 2003 oh, reason is i know a mechanic at a nissan daler who showed me the Castrol catalogue, and it does say (in Castrols opinion of course) that the RS is the max protection, actually listed, under the toyota supe 2zgte, but after reding the threads, im worried ! Ive bought it, but not put it in yet, - exactly what seals are we talking about?? cheers Quote Link to comment Share on other sites More sharing options...
Alex Posted April 27, 2003 Share Posted April 27, 2003 All the seals...but the most significat would be the piston rings. Quote Link to comment Share on other sites More sharing options...
Terminator Posted April 27, 2003 Share Posted April 27, 2003 I put a 0W40 oil in my Cosworth engine once and it smoked like an old banger. After 1000 miles of smoking like garden bonfire, I went back to a trusted 10W40 ad not a sign of a puff and still none at 110K miles. Quote Link to comment Share on other sites More sharing options...
dpepper Posted April 27, 2003 Author Share Posted April 27, 2003 ok, thanks guys. Quote Link to comment Share on other sites More sharing options...
Supra_Al Posted April 28, 2003 Share Posted April 28, 2003 Originally posted by Terminator I put a 0W40 oil in my Cosworth engine once and it smoked like an old banger. After 1000 miles of smoking like garden bonfire, I went back to a trusted 10W40 ad not a sign of a puff and still none at 110K miles. Terminator.......i once used 0W 40 oil in my cossie too, and it went from an occasional 'tap' to a 'bag of nails', too thin for the crude pinto me thinks! Al. Quote Link to comment Share on other sites More sharing options...
Tony Smiley Posted April 29, 2003 Share Posted April 29, 2003 Guys, Ok, i stand to be corrected!!! But, in all my years of rallying, building engines and breaking them! I believe the understanding of a multigrade oil has been lost. a 10/50 acts like a 10 W oil cold (0deg f), but when warm acts like a 50 w (85-110 deg f) and effectivelyu gives the same protection. therefore anything that is a 40 or 50W when hot should not cause any problems, but will give better protection when the engine is cold. All of the oil manufacturers are trying to achieve a broader range of operating temperatures and this is why Synthetics are now so popular. the lower oil specific weight should be irelevant once the engine is up to normal temp. Tony Quote Link to comment Share on other sites More sharing options...
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