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Oil types/grades/spec clarification

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Old Jul 24th, 2018, 08:25   #21
DaveNP
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Quote:
Originally Posted by AndyV7o View Post
Since Ive had all day to dwell on it (and clearly fancy a public conversation with myself ) ...
Keep talking Andy, it's good stuff but most are probably like me and can just about manage errr....ummm...uh-huh as contributions to the conversation

Oil specs are something I've looked at several times over more recent years as running a 20 year old car means oil specs have moved on a lot since the handbook was written and they don't sell some of the preferred products anymore which leaves me standing in the shop wondering 'what is the difference between A3 and C4?' and 'is it backwards compatible?' etc.
My only observation would be that we do get hung up on the X-w-YY figures on oil and from what I can see, especially with the w figure, most of the difference will only be apparent at ambient temperatures outside of the normal range of UK temps.
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V70 2.5 10v Torslanda Manual 98 Sreg
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Old Jul 24th, 2018, 08:52   #22
AndyV7o
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Yeah, we dont experience the extreme cold where the xW is a major concern. It still helps understand which will circulate quicker upon start-up, and what might be too thick for the engine to shove around, put a 20w in summat specced for a 0w and you're asking for bother, but, ya'd have to be daft to put 20w50 in a modern engine anyway!

The umming and arring is what Im attempting to help people with...
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Old Sep 1st, 2018, 10:23   #23
AndyV7o
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Interesting read re: ZDDP; https://www.google.co.uk/url?sa=t&so...V2EYI3fTFv7yot

Basically a zddp additive company giving info re: zddp which is very honest to the point it could actually reduce their sales (though the conclusion is that their product is good to use, but in moderation)
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