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Originally Posted By: OVERK1LL It doesn't shear in all applications. It didn't shear in my Ford Modular for example. In that (rare) cases where M1 doesnt share (or share down a little)SLX share even less. Do you prefer M1 0W-40 over GC and why if i may ask? P.S. I dont prefer neither, both...

Originally Posted By: pipo Mobil 1 0W-40 wins!:what: Yeah, but question is what happens after cca 3.000 kilometers? As we all know (based on many UOAs) that M1 0w-40 shears down to cca 11,7 CsT at 100 degrees after that millage , just exactly like SLX 0W-30 does after that millage (shears also...

Originally Posted By: sangyup81 Originally Posted By: SnogardE55AMG i had always put a lot of research and time into finding the right oil for my engine You're a great fit for these forums! Thanks. I realised that also:-)

Originally Posted By: A_Harman Is your car pumped up over stock HP? This is a danger when modifying supercharged cars; you can pump up the power easily, but if you don't do the additional engineering necessary to make the car live at the higher power, you can end up with a blown engine. We...

Thanks to all of you who helped me in this thread. According to all your advices my decision is to use Mercedes OEM oil Mobil 1 0W-40 in all circumstances (between that maybe do some good UOA), except if my oil pressure will drop at high temps when my car will me moded. And even then, at winter...

Originally Posted By: d00df00d As oil heats up, it becomes thinner. If the oil is too thin for the temperature, it will not protect the engine. Thus, the higher the temperature, the thicker the oil needs to be. This is why not all cars benefit from a thicker oil.... Thank you so very much for...

Originally Posted By: Merkava_4 From reading this whole thread, the OP is saying that Mobil 0W-40 is not making his engine run as quiet as he wants; nor is German Castrol 0W-30. And from what I'm reading, the OP seems to think that a thicker oil is what's needed to quiet the engine. My question...

Originally Posted By: A_Harman A big difference in the SLR is that it makes 600+HP, and your car makes 469.... That exactly is the problem i think; My car indeed make 476 HP stock, but many of us E 55 AMG owners did pump up our HP to over 650 crank HP (with just few bolts on, nothing change...

Originally Posted By: d00df00d Mobil 1 5w-50 is used in the SLR because that car will generate higher oil temperatures than yours will.... If that is your only explanation then let me again clear it to you. As i already said, many of us non SLR (but ordinary AMG) users with same engines like...

Originally Posted By: d00df00d Originally Posted By: SnogardE55AMG ...and yet mercedes SLR with same engine still use one after mercedes recomendation (229.3 Mobil1 5W-50). Can you explain that. I can not. I offered an explanation earlier. Are you actually reading what people are saying to you...

Originally Posted By: d00df00d [You may notice that there isn't a single xw-50 oil with MB229.50 approval any more... ...and yet mercedes SLR with same engine still use one after mercedes recomendation (229.3 Mobil1 5W-50). Can you explain that. I can not. Like i said, first i will try with...

Originally Posted By: CATERHAM If you still have concerns that the oil may still be too light when the oil gets hot, there is one sure fire way to find out, and that is to install an oil pressure gauge.. Actually i did just that last weekend because my car doesnt have OP gauge, neather warning...

Originally Posted By: chubbs1 Take care and WELCOME Thanks man!

Originally Posted By: d00df00d Noise is not a good guide to whether an oil is good for your car, nor is switching to a thicker oil a good solution for most problems. Thicker oil may deaden sound, but it will compromise heat transfer and reduce flow rates on cold starts. Not a good trade-off. I...

Originally Posted By: JHZR2 It concerns me that it appears that you like certain responses only because they tell you what you want to hear. That isn't really being objective and listening to reason. I came here to collect opinions (and learn new facts), because without any doubt, you users...

Originally Posted By: Gearhead113 Now whether the improved fuel economy minimums come from a lower High Temperature/High Shear rating, the addition of more friction modifiers, higher quality base stock etc. or a combination I don't know... I thought that fuel economy minimums comes only and...

Originally Posted By: opposite_locker You would probably be fine on either Mobil 1 5w50 or the TWS, but I believe both oils are known to shear down to a 40wt... So if i am not concern about quick shearing of TWS (i do oil cghanges very often), then TWS will work fine for me?

Originally Posted By: Gearhead113 Mobil 1 SuperSyn 5W-50 is approved and should work well. MB chooses oils off direct consideration of many factors, including long drain intervals, cold starts, and meeting fuel economy improvement requirements. Based solely on wear protection 15w-50 should be...

Originally Posted By: Gearhead113 These two oils are the only oils that meet the 229.50 spec, which are of 0W-40 viscosity. Mobil 1 SuperSyn European Car Formula 0W-40 (USA) Mobil 1 Turbodiesel 0W-40 Yeah, but i dont care for 229.5 since it is based on ECO norms more than on engine...

Thax@ O.K. i respect your advice, but anyway could you tell me why should i not use Mobil 1 5W-50? It is OEM oil for SLR (which have almost the same engine as my E55)and i run my cars hard. I also avoid shiort trips and on top of that temperatures here are not that low not even in the winter...