Royal purple 5w40 and 0w40?

[Motomaniac22]

Has anyone used either of these in a b5 s4? How did they do? The 5w40 has synerlec which apparently makes it better over non synerlec oils. I currently am running 0w40 Mobil 1 but am feeling an itch to try Royal purple. I've used it before in another vehicle and never had an issue and my friend has used it before with no issues either. I've searched about rp and our b5's but it all seems to be from a while ago and idk how long the 5w40 and 0w40 has been out so I'm not sure if people were reviewing them at the time. Tell me what you guys think? Is RP better equal or worse than Mobil 1? And how do they both stack up with rotella? Please refrain from using price as an example as price isn't an issue for me. These 3 are extremely available to my location. I know everyone says rotella is the cheapest then Mobil 1 and then RP. But I just want to know what is the best between the 3? Thanks in advance guys

[S4 00 2.7]

I've come across threads saying that RP does not work well in our cars. It was a while back ago so you will have to search for it.

Whats wrong with Mobil 1?

[rusky]

I've been using RP 5w30 for a while now, but I keep seeing people using 5w40, so is that a better weight? I've just been using what I thought was the stock oil.

[Motomaniac22]

No issues with Mobil 1 that are obvious. I just have an itch to try something. I know Mobil 1 is good just for some reason I want to try something else.

[Fourplay]

No issues with Mobil 1 that are obvious. I just have an itch to try something. I know Mobil 1 is good just for some reason I want to try something else.

There's no point. Rotella will protect the engine and turbos from wear just as well as RP. M1 is fine as well. You're not going to hurt the car by using 5w40 RP, but it's just spending money for the sake of spending money.

[Audi9]

Go away op. Far. Far. Away.

[NOTORIOUS VR]

IMO RP is garbage... never see it do any good no matter what product from them.. motor oil or transmission oil.

[HighPsi(NorCal)]

Go away op. Far. Far. Away.

there is no reason to be a dick, why don't you grow up or go away.

OP, I have run 5w-40, I have absolutely no complaints about it, and if I was going to extend out my oil change interval, RP or LiquiMoly would be my first 2 choices. You will find a lot of opinion on here with absoluetly no evidence or fact to back it up, just a bunch of "well I heard RP is dookie". I still run Royal Purple in my built 300zx, have been since 2011, and will continue to do so.

[Audi9]

there is no reason to be a dick, why don't you grow up.

There is when the op constantly makes pointless threads that have been discussed literally HUNDREDS of times. A quick search would bring up everything needed to answer any questions

[S4 00 2.7]

IMO RP is garbage... never see it do any good no matter what product from them.. motor oil or transmission oil.

I've heard this many times as well.

[S4 00 2.7]

There's no point. Rotella will protect the engine and turbos from wear just as well as RP. M1 is fine as well. You're not going to hurt the car by using 5w40 RP, but it's just spending money for the sake of spending money.

+1 many people use Rotella and are happy.

[Motomaniac22]

Between rotella and Mobil 1 is there an advantage of either over the other? I know Mobil 1 would be better for my climate in the winter but over are they pretty equal or no? Mobil is actually cheaper for me from a per quart stand point than rotella. So price is better in favor of Mobil 1.

[Motomaniac22]

Anybody?

[Motomaniac22]

Bump* anyone have an answer to my most recent question posted 2 posts above?

[NOTORIOUS VR]

Bump* anyone have an answer to my most recent question posted 2 posts above?

Oil's have been debated to death on almost every single forum and corner of the internet.

If you really want answers, you just need to dig in and do a whole bunch of reading on the subject and then come to a decision yourself.

Bottom line: Stick with any of the major brands that are popular in the high performance automotive industry and you will be just fine.

[Motomaniac22]

I'm just wondering if rotella or Mobil 1 are better than the other? And if so in what ways?

[NOTORIOUS VR]

I'm just wondering if rotella or Mobil 1 are better than the other? And if so in what ways?

And you think you're going to get the answer here on AudiZine?

Why don't you use some of your precious time that you waste on here and read up on the differences yourself?

[Fourplay]

Mobil1 0W40 is an SL rated oil, which is allowed to have up to 1000ppm ZDDP. Rotella is not SL or GF-4 rated, so it has a higher ZDDP content (1200ppm).

ZDDP forms a sacrificial layer on cams and cam lifters that prevents wear. Up to a certain point, more ZDDP is better for flat tappet engines (like the one found in the B5 S4).

Rotella will protect your cam lobes and cam lifters better than M1. It's also designed for use in turbo diesels, so it will have plenty of detergents and resist coking reasonably well.

[Audi9]

Mobil1 0W40 is an SL rated oil, which is allowed to have up to 1000ppm ZDDP. Rotella is not SL or GF-4 rated, so it has a higher ZDDP content (1200ppm).

ZDDP forms a sacrificial layer on cams and cam lifters that prevents wear. Up to a certain point, more ZDDP is better for flat tappet engines (like the one found in the B5 S4).

Rotella will protect your cam lobes and cam lifters better than M1. It's also designed for use in turbo diesels, so it will have plenty of detergents and resist coking reasonably well.

Do you know what detergents do? Do you know why a diesel oil has higher levels of zddp? If you and others did then you would see that Rotella and all the others are no better then a high quality oil designed for a gasoline engine. The 2.7 is a modern DOHC engine that doesn't require anything special in regards to lubrication. Use any high quality synthetic oil with regular changes and your engine will last damn near forever

[Fourplay]

Do you know what detergents do? Do you know why a diesel oil has higher levels of zddp? If you and others did then you would see that Rotella and all the others are no better then a high quality oil designed for a gasoline engine. The 2.7 is a modern DOHC engine that doesn't require anything special in regards to lubrication. Use any high quality synthetic oil with regular changes and your engine will last damn near forever

In a past life, I got a degree in chemical engineering, so I fully understand the role of high/low temp ZDDP, the use of more dispersants and detergents in diesels to counter soot, etc. I wouldn't call a flat tappet cam engine with a base design from the late 1980s modern, but to each his own.

Rotella is going match or be better for cam wear than most synthetics, slightly worse for bearings, and better for resisting turbo coking.

[Audi9]

In a past life, I got a degree in chemical engineering Nice, so I fully understand the role of high/low temp ZDDP, the use of more dispersants and detergents in diesels to counter soot, etc. I wouldn't call a flat tappet cam engine with a base design from the late 1980s modern, but to each his own. I consider it modern compared to a flat-tappet pushrod engine which would be the only type of engine (in regards to street use) that special care would need to be given when selecting an oil.

Rotella is going match or be better for cam wear than most synthetics, slightly worse for bearings, and better for resisting turbo coking.

See red