[Mosaud1998]

I've been using Liqui-Molly 5w-40 for two years now. 0 issues. But, whenever I bring it up some people say it's over rated. What's your opinion?

[Tambohamilton]

Slippy stuff in engine = win.

[3PedalJake]

You change your oil often enough that you'll never know if it's good or not. At 2100 miles even the cheapest generic brands haven't started breaking down their additives or losing viscosity.

[e91Owner]

^^ this. If there's someone who has shown an actual increased failure rate of components when selecting one oil or another, I certainly haven't seen it.

Liqui moly makes fine oils. So does any number of brands. Walmart branded non-LL-01 synthetic 5W-30 oil would probably not change anything either. I use liqui moly as I only had to buy it once.

[ctuna]

I was using mobil 1 and went to liquid molly after they dropped the LL-01 rating.
It's harder to obtain it but it seems fine.

It seems like a kind of German boutique oil . They have a good wrap .

If you change your oil every 5k my guess is LL-01 won't make any difference.

[mainbearing]

If this is the Liqui-Moly from FCP you are using then the LL98 standard is obsolete. Since you are getting oil and filter FREE for life, besides the LL98, I would not mind.

I do however use non-LL01 Audi 502/505 oil in the E90. If Walmart happens to stock LL01 licensed Castrol Edge 5W40 then I also use that (people said Castrol Edge 0W40 is the better oil however). I just like to keep one kind of oil on the shelf with these older engines. I do not run them that long anyway.

https://www.fcpeuro.com/products/5w-...ui-moly-lm2041

"The LL-01 specified oil is better than the LL-98 specified oil in the areas of oxidative and soot thickening, sludge, wear, and piston deposits. It remains high HTHS and SAPS for the OP's vehicle requirements. LL-01 is also ACEA A3/B4-04 rated versus A3-98 & B3 for the LL-98."

https://bobistheoilguy.com/forums/th...04-oil.159417/

[BSM n54iS]

I use French boutique oil and have been very happy.

I will be using their engine flush and ceratec for a 110k treatment though to try out.

[3PedalJake]

For a lot of us it will never matter. I'm not down the rabbit hole far enough to be changing mine at 2000 miles, but usually long before the CBS says I need to, generally around 5 or 6k. LL (long Life) spec oil will last far longer than that, and I don't think you can wear out any oil no matter how cheap in 5k miles. If you rely on the CBS or are on extended change intervals then the LL spec oil is a more important consideration.

That said, I'm running LiquiMoly 5w-40 in both of mine. It's good oil no doubt and there's just something to be said (maybe placebo effect) for giving your baby the best.

[gster109]

It's fine on 99% of cars but not for high performance where sheer temp is much smaller of a tolerance.

DAW the turbo creator has labeled a couple higher grade oils he recommends over liqui. He claims that NA Liqui is not the same as the stuff they use in Germany.

[e91Owner]

Originally Posted by mainbearing

If this is the Liqui-Moly from FCP you are using then the LL98 standard is obsolete. Since you are getting oil and filter FREE for life, besides the LL98, I would not mind.

I do however use non-LL01 Audi 502/505 oil in the E90. If Walmart happens to stock LL01 licensed Castrol Edge 5W40 then I also use that (people said Castrol Edge 0W40 is the better oil however). I just like to keep one kind of oil on the shelf with these older engines. I do not run them that long anyway.

https://www.fcpeuro.com/products/5w-...ui-moly-lm2041

"The LL-01 specified oil is better than the LL-98 specified oil in the areas of oxidative and soot thickening, sludge, wear, and piston deposits. It remains high HTHS and SAPS for the OP's vehicle requirements. LL-01 is also ACEA A3/B4-04 rated versus A3-98 & B3 for the LL-98."

https://bobistheoilguy.com/forums/th...04-oil.159417/

I think most people use this from FCP—5W40 Leichtlauf High Tech Engine Oil, which is LL-01 approved.

https://www.fcpeuro.com/products/5w-...ro-moly-lm3864

Some people also use molygen 5W-40 from them (also LL-01)

[mainbearing]

The Leichtlauf 5W40 has a few more approvals (Fiat, Opel, Peugeot Citroen) than Castrol Euro Edge 5W40 but otherwise similar.

And with FCP's lifetime replacement policy it is going to be much cheaper than Castrol locally.

Looks like a nice oil, and the FCP price is right. Why not? Except those who pay full retail maybe? LOL

[lookalikehuuh]

Every time I see people dumping on someone else's oil brand choice I laugh because not a single one of them ever has concrete data that their preferred brand would actually make a difference.

While yes there are higher quality oils vs others as long as you do proper maintenance and don't beat on the car while the oil is cold I see no reason why you should use one brand over another. Stick to the brand that you are comfortable with and change it on a regular basis. Even "no name" brand oils like costco's Kirkland signature has good science behind the formulation.

[3PedalJake]

Originally Posted by e91Owner

^^ this. If there's someone who has shown an actual increased failure rate of components when selecting one oil or another, I certainly haven't seen it.

Liqui moly makes fine oils. So does any number of brands. Walmart branded non-LL-01 synthetic 5W-30 oil would probably not change anything either. I use liqui moly as I only had to buy it once.

That's what I've never seen in all the threads either. Outside of N54 rod bearings and the turbos that are common I haven't seen any trends at all about oil related failures in an otherwise working and pressurized system. Ppl on here are now well over 400k and no slowing down, they're really robust engines, you would have to try real hard to kill one with cheap (specced) oil and regular changes.

[Serf27]

Walmart brand oil is like half the price or less than others.
Why or how

[3PedalJake]

Originally Posted by Serf27

Walmart brand oil is like half the price or less than others.
Why or how

They don't have to develop it, it's usually lagging the big manufacturers on specs. They don't have to advertise because well lol wallyworld and it doesn't actually have to last as long (tests show it's not bad tho) so less detergents and stabilizers. Still, I'm thinking if you change oil at 5k it's plenty good enough that oil related problems are the least of your worry on a 10+ yr old car. The expensive high spec oils don't really shine until later in life when the lesser stuff has broken down, it's not better right out of the gate in any meaningful way.

[Tambohamilton]

There's a lot of oil data on 540rat's website...IIRC. some surprising test results.

But as should be said more often; fresh oil is the best oil. And any oil of an appropriate spec will be fine in 90% of applications.

I run Fuchs oil in my 330d. It's 5w30, and LL-04 approved so I don't poison the DPF. And it's £4/L, which is half the price of most oils in the UK. Admittedly even then I'm being a bit of a brand snob, because there are cheaper off-brand oils available...but as 3pj says placebo is important for your pride and joy!

[oVeRdOsE.]

Originally Posted by gster109

It's fine on 99% of cars but not for high performance where sheer temp is much smaller of a tolerance.

DAW the turbo creator has labeled a couple higher grade oils he recommends over liqui. He claims that NA Liqui is not the same as the stuff they use in Germany.

+1, very hard to say.

Stats should be based on very on unreliable engines.

n52-54s are pretty good engine, even if you put 1$ dollar store oil, in average owner life, they wont see any difference.

Now, get a 1st gen n20, or many older audi engine, and speak to people who got 300kmiles+ on it .

[lookalikehuuh]

Originally Posted by oVeRdOsE.

n52-54s are pretty good engine, even if you put 1$ dollar store oil, in average owner life, they wont see any difference.

Just to be clear..... I hope you don't mean Dollar General motor oil. DO NOT USE DOLLAR GENERAL OIL, it is only API SF rated which means it MUST NOT be used in engines built after 1988. In fact they have been sued several times times over that product. E90 manual directly states only API SH or higher rated oils are allowed to be used.

In summary... DO NOT USE DOLAR GENERAL MOTOR OILS..... unless you want to blow your engine that is.