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Oil for SLR


Roger Doidge

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I think 5w-40 is the recommended oil. I always used to use the Halfords fully synth with regular changes and no ill results, but swapped to a pricier/technically superior (but who knows if it makes any real life difference..., but I feel better about it) Silkolene Pro S 5w-40. There's a huge thread on this from several months ago.
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Used to run my supercharged G40 on Mobil 1 0w 40 and did just over 100K miles and the engine was still running very nicely when I sold it. Noticed much improved start from cold and was more willing to rev than when using "thicker" oils. Not sure how much help this is to a K-series engine owner 🤔
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