I was to order online a Mobil 1 full synthetic 5W30 for my 2008 MB E320 bluetec but I became confused when the bottle says :"for gasoline engines"
If full synthetic, are there any difference if oil is labeled for gasoline or Diesel?
There are also some full synthetic for Diesel but 5W40.
Thanks for your answer.

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Nyck - TX - USA

Use diesel specific synthetics. Walmart sells diesel specific brands of synthetics. Both my diesels use them.

My Corvette calls for; a specific 5w-30 Mobil 1, and now a special 0w-40 Mobil 1, I use them.

I saw Walmart selling "Mobil 1 Turbo Diesel Truck Full Synthetic 5W-40.
Is this the one you are talking about?
Thanks

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Nyck - TX - USA

One of many that are perfect. I'm using Delo diesel synthetic. Cheaper than Mobil 1.

Thanks for replying.

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Nyck - TX - USA

At a minimum diesel engine oil will be C rated, your owners manual will show more specific ratings/approvals. Gas engine oil will have an S rating.

Good luck!!!

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"Rudeness is a weak man's imitation of strength" - Eric Hoffer

The right Mobil1 for the 642 has the “ESP” suffix. Also compliant with the MB 229.51 and 229.52 specifications. Note that 229.5 is the gasoline engine compliant oil.

This is the low ash oil that is essential for protection of the DPF.

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The OM 642/722.9 powered family
Still going strong
2014 ML350 Bluetec (wife's DD)
2013 E350 Bluetec (my DD)

both my kids cars went to junkyard in 2023
2008 ML320 CDI (Older son’s DD) fatal transmission failure, water soaked/fried rear SAM, numerous other issues, just too far gone to save (165k miles)
2008 E320 Bluetec (Younger son's DD) injector failed open and diluted oil with diesel, spun main bearings (240k miles)

1998 E300DT sold to TimFreeh
1987 300TD sold to vstech

^ This exactly. The only mobil 1 oil that is approved for your engine is the one with "ESP Formula" in large font on the label. It has a green label and green bottle top.

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Current fleet:
1998 E300 turbodiesel
2008 E320 bluetec - leaky oil cooler seals replaced
2012 S350 bluetec
2015 GL350 bluetec

Sold:
1996 Passat TDI
1997 E300 diesel

I found on Walmart for $9.99 per quart.
I would prefer the 5 qt bottle but they don't carry it
Thanks

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Nyck - TX - USA

Check your dealer, they might surprise you. Mine did.

that cutting oils your running are killing motors. 5w40 much safer. they use thin oils,to brag on mpgs, while thoose motors are eating themselves up.

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1999 w140, quit voting to old, and to old to fight, a god damned veteran

Which om642 vehicle do you run 5w40 in, mind sharing?

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Current fleet:
1998 E300 turbodiesel
2008 E320 bluetec - leaky oil cooler seals replaced
2012 S350 bluetec
2015 GL350 bluetec

Sold:
1996 Passat TDI
1997 E300 diesel

I run 0W30 ESP and the label has prominent green colors, large font ESP, and a cartoon of a car with an absurdly huge DPF. However the cap isn’t green, it’s silver like the rest of the bottle.

Not trying to be difficult, but there are ESP bottles out there with gray caps, and I didn’t want the OP to turn down the correct oil because it had a gray cap.

__________________
The OM 642/722.9 powered family
Still going strong
2014 ML350 Bluetec (wife's DD)
2013 E350 Bluetec (my DD)

both my kids cars went to junkyard in 2023
2008 ML320 CDI (Older son’s DD) fatal transmission failure, water soaked/fried rear SAM, numerous other issues, just too far gone to save (165k miles)
2008 E320 Bluetec (Younger son's DD) injector failed open and diluted oil with diesel, spun main bearings (240k miles)

1998 E300DT sold to TimFreeh
1987 300TD sold to vstech

Just an aside, 229.1/.3/.5 are all diesel-rated also. 229.5 is now apparently specced by MB for some of the older diesels without DPF like the OM603.

Added a Mann Provent 200 to the PCV line and am now running Rotella t6 5w-40. I have been amazed at how much blowby oil that thing catches. I drain it every 2,000'ish miles and get about 2-3 ounces of oil that would have gone through the turbo, intercooler, and intake. When I did the oil cooler seals the gooey tar that is normally coating the intake was actually dry and starting to flake off. Keep the oil out or the intake and the soot from the EGR doesn't have anything to stick to. Hey, it's working for me.

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2014 GL450 76K - Wife's DD
2013 GL350 123K - My DD
2002 ML320 300K hard miles (workhorse)
2001 Z3 105K the 4 weeks a year ride
1995 E300D 189K - Rarer ALL options one ortho seats & all

Past ones
2015 XC70
2008 V70
2003 XC90 2.9 (POS)
1998 Wrangler (sporting a SBC 388)
1995 E300D 500K - Should have kept it!
1985 E300DT
1984 E300DT-T
1984 240D Gray market