Originally Posted By: HerrStig
Originally Posted By: Timo325
I don't want to start a forum war, was just doing some research.
I am considering going back to 5-30 for the Mustang. I used GC 5-30 in Germany for the autobahn runs..
I will make a separate post later for opinions on 5-20 vice 5-30 in the Mustang.
I had read this from 2006:
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Re: Ford's write up on their reasons for use of 5W-20 - 06/16/06 10:59 PM
quote:Originally posted by Rodbuckler:
I tried GC (a thick 30) and had to drain it out immediately for fear of losing the engine.
There is no way a 30 or 40 weight will protect my engine better than the 20 weight. The engine is designed for the 20 weight.
And then how about all those tiny and tight Honda engines running perfectly in Europe on the specced by Honda 5w-30?
Engines are NOT designed to run on one particular grade!!!
This myth is being repeated countless times and none here seem to care to challenge its validity.
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https://www.bobistheoilguy.com/forums/ub...amp;type=thread
So I wanted to know everyone's thoughts on "engine tolerances" using multi-grade oils..
Can it damage an engine? Was GC 5-30 a bad call for those hard runs?
Engine burns about a qt every 7.5 to 10k (negligible I know..)
Thank You.
And what caused this "experts" fear of "losing" an engine. That it was going to fall out?
Ignorance, like pretty much every other post here on nonsense "CAFE conspiracy!!!"...