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Hmm yes there appears to be a discrepancy between the TDS and the bottle.

I've been looking up various cheap oil specs. The best bang for buck I can find is Valvoline Synpower 5w40 at £62 for 20l. https://www.valvoline.com/en-au/synpower-synthetic-engine-oil-5w-40/ PI Sheet...

Good spot. I think i'll send them a cheeky email.

I don't know what it's like in the US, but false advertising can land you in a lot of trouble in the UK. If they're advertising that it meets the spec, then i'm going to believe that it meets the spec.

Sorry I don't folloow. Could you put that in laymans terms please? Edit: Sorry brainfart. The API is SN, not SL.

I know minimal about the chemistry and make up of oil (compared to some of you lot), so i'd like your opinion on this oil: https://www.shieldchemicals.co.uk/5w40%2Dfully%2Dsynthetic%7E1576 SDS can be found here: https://www.shieldchemicals.co.uk/asps/resources/pdfs/1576-1.pdf TDS can be found...

The mercedes forums are not replete with examples that have failed due to improper oil. If they are, prove it. Every single fully synthetic oil I can find tells me it meets the mercedes specification 229.5. That's good enough for me. It may not be on Mercedes' approved oil list, but that...

Weasley, many thanks for you insight.

My predispositions haven't been proven by anyone to be incorrect. Not one person has claimed a particular oil has caused engine failure. Hence oil is oil (to an extent). I'm my case, I'm nowhere near to finding that extent. I never said I was going to buy the cheapest, unapproved, unbranded...

I understand where you're coming from, but equally that's just bollocks. The cheapest oil will not cause engine failure. I've never heard of that. It will however cause failure when pushed beyond its limit. And that's not going to happen with a daily. Astro, many thanks for the links. I'll do...

If you read my posts, you'll find that's exactly what I've stated. M1 Vs cheapo FS don't tell you a single thing about what differentiates them on the bottle. Both bottles say what spec it meets, but that's about it. It says nothing about its make up. Only the price is double or more for M1...

Sorry, could I ask that we keep acronyms and technical jargon to a minimal please? I don't understand any of it. I'd like to learn, so if you're going to put it, please explain what you mean, e.g. TBN, UOA etc. y Unfortunately none of the oils for sale that I've seen state anything about...

Why does the oil HAVE to meet the manufacturer's recommended spec? What's wrong with using cheap oil? Just how much extra wear will it cause? Is it even quantifiable? I've had the car for 4 years. It's only turned into a daily in the past year, and it's currently got 125k on it. You yanks...

Im based in the UK and I've got a 2000 clk55. The car is well maintained by myself. I cover around 750-1500 miles per month, mainly motorway driving. My driving style is fairly sedate, but I give it a squirt now and then. I tend to change oil when the dash display tells me to. 10000 miles...