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1998 Cadillac SLS, 2002 Cadillac DTS
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133 Posts
Discussion Starter #1
Recently I noticed when engine is hot and I Accelerate from a light or stop my valves tap for about 5 seconds. Currently I'm running 10w30 synthetic blend. My questions are do I need to switch to a heavier weight oil , and if so what weight should I go????
 

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1997 Eldorado
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637 Posts
depends on your climate. i live in houston and i have to run 10w-40 (owners book says to use 10w-30) or else i get low oil pressure on the dash is it hot in your area?
 

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2002.5 F55 CORSA STS, 2014 Explorer XLT FWD
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71,032 Posts
Curious that no automobile engine manufacturer currently in existence recommends running motorcycle weight multigrade oils.

Why doesn't the cutesy oil use graph in most owner's manuals also indicate 20W-50 along with 10W-30 or maybe 10W-40 (in Saudi Arabia)?
 

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2005 White Diamond STS N* 1SF RWD ACC/HUD
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2,052 Posts
The motorcycle weight oils are never labeled as "energy-conserving" as those additives cause the wet clutches in motorcycles to slip. I assume that is why they aren't recommended for cars. My bikes use 10W-40.
 

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2001 seville sls
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18 Posts
i live in the bahamas, maybe my florida colleagues can answer shud i use 10w30 or 10w40? my seville is at 80k miles
 
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