Engine Oil
02-27-2017, 12:28 PM
#4
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W204 C63 Coupe, W166 ML350 BlueTEC, 928GT, C5 Z06 & IS300 race cars, EQE 4Matic+ on order
The question itself is not worded correctly. It's like asking if hay is a good food for animals. It is for horses, but not so much for dogs.
A 229.5 spec oil (like the M1 0W-40) is for gasoline engines, and the M1 0W-40 is a very decent oil.
A 229.52 spec oil - in 5W-30 viscosity - is the proper oil for a diesel Bluetec. DanD - that's exactly what you should have in your car.
A 229.5 spec oil (like the M1 0W-40) is for gasoline engines, and the M1 0W-40 is a very decent oil.
A 229.52 spec oil - in 5W-30 viscosity - is the proper oil for a diesel Bluetec. DanD - that's exactly what you should have in your car.
03-07-2017, 08:34 AM
#7
I'd stick with a 40 weight oil in this diesel if you're plannning on keeping it, oil topics generally end up having their own gravity after a while, hard to see trees through the forrest.
For warranty...use spec, but:
40 has better crankshaft bearing protection(for diesel)
30 better fuel economy (keeps EPA happy)
For warranty...use spec, but:
40 has better crankshaft bearing protection(for diesel)
30 better fuel economy (keeps EPA happy)
Last edited by nookie; 03-07-2017 at 08:47 AM.
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03-07-2017, 10:21 AM
#8
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Not necessarily.
If you've got an old school NA lump with flat tappet cams or a race motor with loose bearing clearances AND a high volume oil pump, then a heavier viscosity oil (xW-40) will help cushion the bearing loads while maintaining good oil film strength and oil pressure when the motor is hot. Cold oil flow isn't much of a concern because it's a race motor (or a nice-weather car) that will primarily be used during warm weather.
For an engine with tighter bearing clearances (like the non-AMG ML/GLE variants) and a daily driver that you won't be takign to the racetrack every weekend and might regularly use in winter, I would stick with a lower viscosity xW-30 oil. You are going to get considerably better oil flow throughout the entire motor that will also provide better engine cooling (no internal hot spots), and the wear on the engine at colder temperatures is also going to be significantly reduced.
If you've got an old school NA lump with flat tappet cams or a race motor with loose bearing clearances AND a high volume oil pump, then a heavier viscosity oil (xW-40) will help cushion the bearing loads while maintaining good oil film strength and oil pressure when the motor is hot. Cold oil flow isn't much of a concern because it's a race motor (or a nice-weather car) that will primarily be used during warm weather.
For an engine with tighter bearing clearances (like the non-AMG ML/GLE variants) and a daily driver that you won't be takign to the racetrack every weekend and might regularly use in winter, I would stick with a lower viscosity xW-30 oil. You are going to get considerably better oil flow throughout the entire motor that will also provide better engine cooling (no internal hot spots), and the wear on the engine at colder temperatures is also going to be significantly reduced.
03-20-2017, 11:48 PM
#10
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They're both decent, MB approved diesel oils. The M1 is thinner when cold so for that reson I'd take the M1 over the LM if you live somewherew where it drops well below zero, but aside from that they're almost identical. Both are made from hydrocracked dinosaur juice base stocks. Neither one is exceptional, but then again that doesn't matter for your application... you're not operating a bucket-wheel excavator 23 hours a day. Just change the oil regularly.
I highly doubt you'll find UOAs on those (I'd check BITOG), but as I said, aside from the cold viscosity they're almost identical.
I highly doubt you'll find UOAs on those (I'd check BITOG), but as I said, aside from the cold viscosity they're almost identical.
