dave walton wrote:
My 94 S350 turbo leaks oil into the intake manifold if I use M-1
5w-40. Switching to 15w-50 essentially fixed the problem.
I have never been able to measure any detectable difference in oil
consumption when using Mobil 5W-40 vs 15W-50 synthetics in any OM60x
engine that was in GOOD condition (I've done this using 4 different 601,
two different 602 and 1 603 engines). In one 601 where the front oil
passage was directly open to the #1 cylinder from a head gasket failure,
the use of 15W50 did slow the consumption of oil (almost halved it) from
a qt in 200 to a qt in 400 miles. A new head gasket lowered consumption
to a qt in about 3000 miles and that slowly improved to closer to a qt
in 4-5kmi over 10-15kmi with either 5W-40 or 15W-50.
If switching from Mobil 1 5W-40 to 15W-50 makes a serious difference,
then there is SOMETHING wrong with the engine. The 5W-40 wasn't at
operating temp and the 15W-50 cold was it?
Marshall
--
Marshall Booth (who doesn't respond to unsigned questions)
"der Dieseling Doktor" [EMAIL PROTECTED]
'87 300TD 182Kmi, '84 190D 2.2 229Kmi, '85 190D 2.0 161Kmi, '87 190D 2.5
turbo 237kmi
