Regarding engine sounds on cold start up - Page 3 - Lexus IS Forum
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post #31 of 32 (permalink) Old 03-17-2012, 07:49 PM
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Depends on the "wrong" oil you are using.

Anything 0W-xx is fine. The 0W just means when it is cold out and the engine is cold, the oil has a lot less viscosity and your motor gets lubrication a lot faster.

Also, full synthetic is the best. But pricey..
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post #32 of 32 (permalink) Old 04-22-2012, 04:38 AM
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My first gen IS is still doing it. If it sits for more than 4 hours, it ticks for a second or two. When it's really cold and the idle is high, it's not as noticeable. Sounds just like a hydrolic lifter that went flat and gets pumped up (I know they don't have hydrolic lifters, but that's exactly what it sounds like).

It's so fucking frustrating that I don't want to put any $ buying fun parts, and I can't sell the damn car this way. If I could only find out what to check.
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