I have 97 LX 450 with 150k on it, i been usin 5w-30 & 10w-30 for 7 yrs also i do oil change regularly by myself around 3k or 3.5 , imean logically oil is oil once got into piston rings mixed n burns. No matter how damn good the synthetic is dont rely on or believe that oil can make u feel better by stayin lil longer.(dont need to get oil change soon) :whistles: The longer u wait to do oil change the faster &
sooner u gonna ruin that motor.