I did my 3 month maintance on my 300E and I took the suggestion of putting 15W-40 oil in my engine insted of the regular 10W-30. In the short term the car runs alot better with this oil then any other oil I tried. The start up is alot better (This could be that it is above 10 degrees C outside), but the car does run better!

Thanks

Interesting ... watch the oil color through to your next oil change. I woudn't be surprised if it gets dirtier earlier than you are used to. My guess the cleaning qualities of this oil.

300ESUPER, I also believe your change to a 40wt contributes to an earlier stronger oil pressure.

BTW, the 91 300e had a similiar problem "Shaking problem on start up 1989 300E" and I hunted, just as you, for the cause.

It turned out to be a bad coil. Go figure. The new coil (after 240k miles) put it back where it was running properly.

Haasman

__________________
'03 E320 Wagon-Sold
'95 E320 Wagon-Went to Ex
'93 190E 2.6-Wrecked
'91 300E-Went to Ex
'65 911 Coupe (#302580)

When you said it was a bad coil. What coil are you refering too?

Fab

Engine coil, the one that sparks the spark plugs.

Haasman

__________________
'03 E320 Wagon-Sold
'95 E320 Wagon-Went to Ex
'93 190E 2.6-Wrecked
'91 300E-Went to Ex
'65 911 Coupe (#302580)

Haasman,

Nice idea about the diesel oil.

Question however.

I am running 15W50 Mobil 1 synthetic in my '90 300e w/191K mi.

Do you know if I can run diesel oil for a cycle (3000 mi.), then drain and replace w/my synthetic again (which I change at 7,500 mi. intervals)?

I am sure that you can. The synthetics are supposed to be completely compatible.

It is my understanding that the synthetics clean quite well, but in relation to the 15w-40 weight, I don't know.

Haasman

__________________
'03 E320 Wagon-Sold
'95 E320 Wagon-Went to Ex
'93 190E 2.6-Wrecked
'91 300E-Went to Ex
'65 911 Coupe (#302580)

How do I test the engine coil to see if it operating properly.

Fab