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Old 09-24-2000, 10:32 PM
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Mike Murrell Mike Murrell is offline
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Join Date: Feb 2000
Posts: 2,357
Larry - I too have read all of the 10W-40 horror stories. My '95 Rodeo shop manuals says it can cause premature wear. I challenged Isuzu to explain why...never got an answer. I then consulted with the 4 big motor oil providers...Castrol, PennZoil, Quaker State; Valvoline. I heard back from the first two. They were at a loss for why their 10W-40 would harm my Rodeo engine. In other articles I come across on the net, the problem with 10W-40 has been remedied.

To sum it up, I have two cars with small hard working engines, one with 240K; another pushing 300K, all using 10W-40 oil.

Mike Murrell
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