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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????
 

· Administrator
2002 F55 STS, 2014 Explorer XLT, F-150
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80,376 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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2014 XTS V-Sport Platinum
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2,921 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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