Found this post on the MMO forum -
"If you go thicker, you risk wearing out your valve guide seals at the least, and valves at the most. Staying with the recommended oil viscosity, except high mileage, seems to work well. I went 185K on 10-30W, and it still did not need additional oil between changes; but I smelled oil at startups near my exhaust. O/W, its running like a new truck, except with Lucas stabilizer added to high mileage oil. My engine is set, and just try to replace components with the best quality I can afford at the time (I get a few go wrong about every 75K, especially in mid-FL heat). Hopefully, I’ll have less go wrong now that I’m an MMO convert!!
Yes, thicker oil feels better for a brief time, but keep an eye on your exhaust at startup. You will soon see blue clouds coming from your exhaust!"
Any truth here ?
"If you go thicker, you risk wearing out your valve guide seals at the least, and valves at the most. Staying with the recommended oil viscosity, except high mileage, seems to work well. I went 185K on 10-30W, and it still did not need additional oil between changes; but I smelled oil at startups near my exhaust. O/W, its running like a new truck, except with Lucas stabilizer added to high mileage oil. My engine is set, and just try to replace components with the best quality I can afford at the time (I get a few go wrong about every 75K, especially in mid-FL heat). Hopefully, I’ll have less go wrong now that I’m an MMO convert!!
Yes, thicker oil feels better for a brief time, but keep an eye on your exhaust at startup. You will soon see blue clouds coming from your exhaust!"
Any truth here ?