What is this brand? Only 10w40 synthetic (and I mean a real full synthetic group 4 or 5 base stock) I know of is redline but they're mad expensive.I use a 10W-40 synthetic that the manufacturer says meets the MB 229.5 specifications. I'm in a temperate climate. Never below freezing but rarely very hot. I change once a year with filter which is about every 2500kms.
An Australian brand, Penrite. The specific stuff I use is unlikely to be in the same league as the redline oil. Maybe more of an 'economy' full synthetic if that exists.What is this brand? Only 10w40 synthetic (and I mean a real full synthetic group 4 or 5 base stock) I know of is redline but they're mad expensive.
There are a fair few 'downunder' oilWhat is this brand? Only 10w40 synthetic (and I mean a real full synthetic group 4 or 5 base stock) I know of is redline but they're mad expensive.
Well it gives you it’s viscosities. But here’s where I stand. At least what I have done.
My M119 is from 1996 and I have used the mobile 5W-40 for sometime...
The big weak point in the M119 for this kind of interval is the conventional paper filter.
So I change it on the SL anywhere from 7500 miles to 9000 miles...
I personally don’t believe that using synthetic oil in the old engine, that was designed for (and ran on) mineral oil is a good idea. Potential risk can very much outweigh (perhaps) debatable benefits.
Synthetic has superior lubricating properties and is more resistant to contamination, hence longer service life. But it also acts as a detergent on the engine that has sludge from mineral oils. Removing that sludge can introduce leaks, it may not happen but if it does, that would be very expensive to fix.
94 SL500 was filled at the factory with mineral oil, I would stick with the same formula.
Other than the filters designed for FSS they are all paper-based. When FSS first came out (1998?) there was a problem with customers not using the proscribed factory fleece filters, and shops would just put in a paper-based filter. Sometimes that got into problems with the extended intervals FSS allowed.Pretty sure M-B does not recommend a paper element oil filter
in their cartridge oil filter cars, a proper felt type is indicated.
ah, M119 take 8.5 qts. (maybe 8 but NOT 6) and the M119 recomended oil at least through 97 is 20W40 or 20W50 for most climates. Later engines use the lower weight oils, but the M119 was designed before the push for lightweight oils for economy and since oil pumps are constant volume with pressure relief, other oils can lead to low oil pressure especially when hot. I suspect it's not as much the 0W or 5W but a /20 that could cause low pressure when hot.Every oil change we have had.....2 SL's...for decades....be it dealership, indy or self....6 quarts. Including filter.
Additional dip stick check done in the morning after the car has been parked all night.
Depending on your climate, winters...
Others will chime in...