Originally Posted By: SR5
Originally Posted By: aquariuscsm
What's the thickest oil anyone has used in a Ford 4.0 V6?
Is that a question or a challenge?
How about Penrite HPR 50
It's 40-70, note the manly lack of W rating
Just joking, but the V6 and V8 Ford Explorers were sold in Australia, which means 3 out of 4 of them would be running either 20W-50 or 15W-40 mineral oil.
But I would listen to Clevy, he obvious has some experience with this engine
Originally Posted By: Clevy
Having a lot of experience with the 4.6 2v I learned some neat tidbits.
The chain guides wearing is highly dependent on the chains themselves. If the chain links were stamped out late in the die's life it makes the edges rough and will rip the plastic guides up faster than if the links were stamped out when the die was new.
Thicker oil does incur a fuel economy penalty however a 40 grade is far better than a 20 grade in respect to the tensioner guides wearing out. It leaves behind a thicker oil film at start up which from what I've seen with mine is the primary time of wear.
Mos2 seems to help. When I put a new tensioner and guides in my 2v at 200000km I also began using mos2. When I tore that engine apart at 300000kms and compared the wear on the guides compared to new ones the only wear I could see was at the ends,and it was very slight. When I originally replaced them at 200000km on the engine the guides were so badly worn the chains actually dug into the metal behind the guides and effectively destroyed everything necessitating complete replacement of everything behind the timing cover.
The only change few the first 200000kms and the last 100000kms was mos2 and I ran a 40 grade during the summer. The car also got a nitrous kit at the same time as I did the chains and tensioner.
So the combo of using a 40 grade and mos2 almost eliminated visible chain guide wear.
So fwiw thicker oil can in a real sense lessen guide wear however an engine is more than just chain guides,so you've gotta consider the whole package.
Haha AWESOME!! :^) I'd love to have a quart of that oil as a souvenir!