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Puff of smoke on startup 200

posted by  GeorgeA on  Thu Mar 3 14:06 CST 2005
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1988 model 240 with 309,000 km on clock. I have changed from Mobil 1 5W50 to SHell Helix Ultra 5W40 recently. Now I get a large blue cloud on first start in the morning, before it was a small grey one. The Shell oil is obviously thinner and seeps down to the compression chamber more readily. This is presumably good for piston-ring lubrication on startup, less so for the environment. But is it an issue that it seeps down in the first place? What do you think?

George Antony





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