One thing I always liked about M1 that seems to still hold true is its
volatility, or lack thereof.
In 1989, I bought a new Plymouth Horizon, and mostly ran 5W30 M1 in it every
7500 miles. Around 1993-94, Castrol ran a rebate on their Syntec (5W40 or 5W50,
I can't remember which) and I tried it. They only had one viscosity grade,
presented it as one size fits all but it was too thick to run in the Horizon, I
just didn't know better back then. Within 5000 miles the oil level had dropped
quite a bit. I never added oil in 7500 miles with M1. My 1977 Saab was even
better, I'd drive it 7000 miles on M1 and the dipstick would still read at the
full line, and the oil would be fairly clear. In the late 1990s, Meijer started
selling store brand 'full synthetic'. I put it in the Horizon, and was a qt low
at 3000 miles.
More recently, the 220kmi Saturn goes 11,400 on the oil life monitor without a
lot of oil consumption, been running 5W30 M1 in that since 186k, and I believe
the PO used it most of the time too.
While I realize there isn't much relationship between lubrication quality and
lubricant evaporation, it seriously annoys me to have oil just up and disappear
under conditions that M1 stays in the sump.
Mitch
_______________________________________
http://www.okiebenz.com
To search list archives http://www.okiebenz.com/archive/
To Unsubscribe or change delivery options go to:
http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
