A lot of the SRT 8 owners are now using the Mobil 1 Turbo Diesel 0-40w oil. Seems the specs changed 3 or 4 years back and the new formulation is SM while the older formulation was SL. The reason for the change, apparently, was for emission purposes. So, who on this forum is using the 0-40 Turbo Diesel oil? The SRT 8 guys believe it is far superior and I'm considering using it in the xfire.

Les

 

Found this searching around. Seems its approved by Mercedes.

MB sheet 229.5 approved oils; "MB Longlife Service Oils"
for passenger cars with gas and diesel engines with extended drain intervals beyond 229.3 oils, to 30,000 km, min 1.8% fuel saving, first oils introduced summer 2002. ACEA A3 B4. For gas engines of the M100 series, gas engines of the M200 series and diesel engines of the OM600 series (not models with Euro 4 diesel particle filters).
229.5 engine oils must be used with fleece oil filter designed for use with 229.5 engine oils.

AGIP Formula LL DC 5W-30 (I)
Aral SuperTronic G 0W-30 (D)
Castrol DCO TOPUP 0W-30 (D)
Castrol Syntec European Formula 0W-30 (USA)
Elf Excellium 229.5 5W-30 (F)
FormulaShell Ultra AB 5W-30 (GB)
Fuchs Titan Supersyn SL MB 5W-30 (D)
Labo MB 229.5 5W-30 (F)
Liqui Moly Longtime High Tech 5W-30 (D)
Mobil 1 SuperSyn European Car Formula 0W-40 (USA)
Mobil 1 Turbodiesel 0W-40
Mobil SHC Formula MB 5W-30
Motorex Profil M-XL 5W-30 (CH)
OMV full syn MB 5W-30 (A)
Pennzoil European Formula Ultra 5W-30 (USA)
Premium Synthetik Motorenöl 5W-30 (DaimlerChrysler, D)
Quaker State European Formula Ultra 5W-30 (USA)
Shell Helix Ultra AB 5W-30 (Mercedes-Benz) (GB)
Shell Helix Ultra DC 229.5 (GB)
Total Quartz 229.5 5W-30 (F)
Valvoline SynPower MB 5W-30 (NL)
Valvoline SynPower 5W-40
Valvoline SynPower 20W-50

Comments?

Les

 

Automobile manufactures have lobbied (and governments have mandated) to reduce the levels of zinc dithiophosphate and phosphorus in motor oils to increase the service life of catalytic converters.

They are highly effective as an extreme pressure anti-wear additive. However, it's probably not overly critical on our SOHC motors as they are equipped with roller-tipped rocker arms, where most wear from the lower ZDDP concentrations manifests itself.

Current Mobil 1 specifications and approvals:
http://www.mobiloil.com/USA-English/...duct_Guide.pdf

 

I heard Porsche people were the first to notice the change. Problems with the cams.
I see 0-40 Turbodiesel is not listed by Mobil. I guess the most common is the 5-40w. I'll most likely use the supersyn 0-40 but perhaps some of the more modified cars would benefit from the extra heat and pressure protection. (They already ditched the cats anyway)
Les

 

Many mb dealers switched to 5-40 for our motors
I put 5-40 mobil one turbo diesel in last time. The valve train is noticeably quieter

 

That's why I went to 5w-40, but it's AMSOIL instead.