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I was running M1 15-50 at the advice of Troy over the summer, since it's so hot down here he said it'd be fine. As fall set in the motor started to vibrate more and seemed sluggish. I got the M1 5-50 in a few days ago and she purrs like a kitten again. MPG is up a bit for the same commute.
 

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I was running M1 15-50 at the advice of Troy over the summer, since it's so hot down here he said it'd be fine. As fall set in the motor started to vibrate more and seemed sluggish. I got the M1 5-50 in a few days ago and she purrs like a kitten again. MPG is up a bit for the same commute.
You should run an oil analysis to see how M1 5-50 is after. =D
 

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Got the 15-50 bottled up, was going to send it in tomorrow. Maybe it's overkill but I've been sending in a sample after every oil change. I only drive it about ~4k miles a year so it's not very often.
 
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