Quote Originally Posted by mucho View Post
Sir dieseldude
we've noticed na umingay tunog nang makina(alterra 2005 37k ODO) after i switched to 5w-40 fully synthetic castrol edge plus from using 15w-40 mineral oil.So far maganda naman sir performance sa highway kaya lang umingay pag rev ko pag city driving.is there something i should worry about 5w-40 synthetic in our tropical climate? masyado pu bang malabnaw ito when advised sa manual ay 15W-40.Need help na pa praning lang sa tunog ng makina maingay pu kc.Wala kc fully synthetic 15w-40 except royal purple.Do you advise me to try royal purple or shift to 15w-40 synthetic blend like caltex delo sports?Thanks in advance.
I don't think 5w-40 oil will cause noisy acceleration. I hope you can validate this and post your findings.

I always stick to the manual's recommended lube.