Quote:
Originally Posted by w123fanman
It's just that I have like 33 gallons of the stuff sitting in the basement. HE has decided to just go ahead and use 5W-20.
Which leads me to my next question: I have 3 MB diesels that don't leak or burn any oil that I could put it in:
my 190D with almost 320,000 miles now
my brother's 300SD with 181,000 miles
and our Sprinter with almost 185,000 miles now
We have ran conventional in my 190D the past 2 oil changes (10w-40 then 5w-40, 3,000 mile interval instead of the recommended 5,000 miles) but according to the PO, it was ran on synthetic Rotella.
The 300SD seems to have been ran on conventional by the PO and we have not changed the oil on it yet (haven't driven it much).
The Sprinter has been ran on synthetic Mobil 1 Turbo Diesel Truck oil (5W-40, changed at 7,500 miles instead of 15,000 miles as recommended by manual) since new. My understanding is that the Mobil 1 oil is a higher grade synthetic, but should that really even matter if we change that oil at half the specified interval?
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Some real world Mobil 1 stuff.....
About four months ago I was asked to help tear down a 1970 280SE with the fuel injected 2.8. The new owner had just bought it from the original owner and it had been sitting with a start-up now and then for about twenty years. Something to do with the original owner dying and now his wife died and so on.....
I asked the guy to start it up and he insisted on tearing it down for a rebuild first. I pointed out that was not the normal order of things and he asked me to look through a fistful of records just to see what I thought of the car from that standpoint. I noticed that the engine had been rebuilt at a cost of $7,800 in 1980 and that every oil change after that was with Mobil 1.
The car looked like it had been sitting outdoors for many years, and the engine area looked like a former crash-pad for homeless rodents. But after removing a bit of linkage and hose we pulled the valve cover.
Everything inside looked new. I mean, shiny from the factory new. So we replaced the valve cover and after a manual turn of the engine gave it a boost and it started.
And after a bit of rough running it smoothed out. I guess the old gas had to purge from the injection pump.
So does Mobil 1 protect an engine from wear? Well, we didn't measure the cam wear (because we could not see any) but it sure works wonders in keeping the inside of your engine clean!