650WHP 2018 Audi S5 Oil Recommendation?

[Cujet]

For an engine that is producing about 110HP per cylinder, (HP/Cyl is a different and solid way of looking at an engine's load, which is what matters), oil must have adequate viscosity and high HTHS to carry the rod bearing and piston pin loads. Since many of the choices will shear, it's often best to choose an oil based on quality and high HTHS.

Let's keep in mind that most automotive engines have rod bearing sizes that are not all that far apart from each other. Sure, there are differences, but for the most part, one automotive engine won't have a 27mm rod bearing and another an absurdly large 80mm rod bearing.

The idea that some of these lower viscosity oils can provide adequate MOFT under extreme loads is generally not correct. Especially if oil temps and pressures are not actively managed.

80HP per cylinder is where 5W-40/HTHS above 3.5 and ideally 3.8 is required.
110HP per cyl really does require an HTHS pushing 5.0 and at least a 15W-50 synthetic.

Been there, done that, for 40+ years.

There is a reason I go right for M1, 15W-50 in my turbocharged builds. Take a minute and let the engine warm up with higher viscosity oils. Other than that, there is no downside.

 

[TiGeo]

For an engine that is producing about 110HP per cylinder, (HP/Cyl is a different and solid way of looking at an engine's load, which is what matters), oil must have adequate viscosity and high HTHS to carry the rod bearing and piston pin loads. Since many of the choices will shear, it's often best to choose an oil based on quality and high HTHS.

Let's keep in mind that most automotive engines have rod bearing sizes that are not all that far apart from each other. Sure, there are differences, but for the most part, one automotive engine won't have a 27mm rod bearing and another an absurdly large 80mm rod bearing.

The idea that some of these lower viscosity oils can provide adequate MOFT under extreme loads is generally not correct. Especially if oil temps and pressures are not actively managed.

80HP per cylinder is where 5W-40/HTHS above 3.5 and ideally 3.8 is required.
110HP per cyl really does require an HTHS pushing 5.0 and at least a 15W-50 synthetic.

Been there, done that, for 40+ years.

There is a reason I go right for M1, 15W-50 in my turbocharged builds. Take a minute and let the engine warm up with higher viscosity oils. Other than that, there is no downside.

5W40 HPL and my car is pushing 100hp/cylinder turbo charged. HTHS on the HPL 40 is about 4.2 I believe. 15W50 is a bit overkill here to me. Tons of these high-powered Audi builds like this all running the typical Euro 40s happily.

 

[Kalle.J]

For an engine that is producing about 110HP per cylinder, (HP/Cyl is a different and solid way of looking at an engine's load, which is what matters), oil must have adequate viscosity and high HTHS to carry the rod bearing and piston pin loads. Since many of the choices will shear, it's often best to choose an oil based on quality and high HTHS.

Let's keep in mind that most automotive engines have rod bearing sizes that are not all that far apart from each other. Sure, there are differences, but for the most part, one automotive engine won't have a 27mm rod bearing and another an absurdly large 80mm rod bearing.

The idea that some of these lower viscosity oils can provide adequate MOFT under extreme loads is generally not correct. Especially if oil temps and pressures are not actively managed.

80HP per cylinder is where 5W-40/HTHS above 3.5 and ideally 3.8 is required.
110HP per cyl really does require an HTHS pushing 5.0 and at least a 15W-50 synthetic.

Been there, done that, for 40+ years.

There is a reason I go right for M1, 15W-50 in my turbocharged builds. Take a minute and let the engine warm up with higher viscosity oils. Other than that, there is no downside.

How does the the AMG 420hp 4cyl 2.0L run 0w20?
You are generalizing too much. "Cylinders" are not equal to one another.

And yo will most likely loose HP at higher RPMs going really thick.

 

[BMWTurboDzl]

How does the the AMG 420hp 4cyl 2.0L run 0w20?
You are generalizing too much. "Cylinders" are not equal to one another.

And yo will most likely loose HP at higher RPMs going really thick.

His caveat revolved around adequate oil cooling and sufficient oil pressure. I'm sure the AMG has plenty of oil cooling to help maintain the min viscosity and HTHS. Without knowing the details of the specific build the responses are going to be more generic. For example the amount of oil cooling and whether the OP is running the stock oil pump.

Also there are plenty of high power stock cars running 10w60 and 5w50 as required. Ford, Ferrari, BMW, for example.

 

[Kalle.J]

His caveat revolved around adequate oil cooling and sufficient oil pressure. I'm sure the AMG has plenty of oil cooling to help maintain the min viscosity and HTHS. Without knowing the details of the specific build the responses are going to be more generic.

Hes been running 0W20 last 20k.....
Clearly temps are within normal range for street driving.
Tuners usually know not to tamper with the temperature warning system.

 

[BMWTurboDzl]

Hes been running 0W20 last 20k.....
Clearly temps are within normal range for street driving.

Right but we don't know if he was tuned the entire time or how he drives the car. Puttering around town is different from Canyon runs at altitude.

 

[thastinger]

My truck makes 737hp/848tq(5.4L) and it usually gets RP HPS 5-30, I used to sometimes use M1 Euro 0-40 until they changed the formula...but I would still run that if I were out of HPS. I run E85 one week a month(race week).

 

[tcp71]

The F150 eco has just over 100HP/liter. The Macan is 117hp/liter. Both get Edge 0w40 and seem to do fine. Even towing through the mountains with 7500lbs (14000lbs total) of trailer attached and 80F temperatures in the case of the truck.

 

[FlyingTexan]

QS Euro 5w40 has 3.88 HTHS and is my favorite only second to Red Line for now. UOA pending lol.

 

[chris719]

For an engine that is producing about 110HP per cylinder, (HP/Cyl is a different and solid way of looking at an engine's load, which is what matters), oil must have adequate viscosity and high HTHS to carry the rod bearing and piston pin loads. Since many of the choices will shear, it's often best to choose an oil based on quality and high HTHS.

Let's keep in mind that most automotive engines have rod bearing sizes that are not all that far apart from each other. Sure, there are differences, but for the most part, one automotive engine won't have a 27mm rod bearing and another an absurdly large 80mm rod bearing.

The idea that some of these lower viscosity oils can provide adequate MOFT under extreme loads is generally not correct. Especially if oil temps and pressures are not actively managed.

80HP per cylinder is where 5W-40/HTHS above 3.5 and ideally 3.8 is required.
110HP per cyl really does require an HTHS pushing 5.0 and at least a 15W-50 synthetic.

Been there, done that, for 40+ years.

There is a reason I go right for M1, 15W-50 in my turbocharged builds. Take a minute and let the engine warm up with higher viscosity oils. Other than that, there is no downside.

I'm not sure we can use a simple rule of thumb. For example, BMW have engines at 87 HP / cyl on 3.1 cP HTHS oil, but we also have older NA high revving engines with much lower power density using 5.2 HTHS for 56 HP / cyl. I agree with your overall point though.

 

[edyvw]

5W40 HPL and my car is pushing 100hp/cylinder turbo charged. HTHS on the HPL 40 is about 4.2 I believe. 15W50 is a bit overkill here to me. Tons of these high-powered Audi builds like this all running the typical Euro 40s happily.

No need to go 5cP in such. It robs power, it creates heat. 3.8 to 4.5 would be, IMO a sweet spot.

 

[Dr_Dr3i]

No need to go 5cP in such. It robs power, it creates heat. 3.8 to 4.5 would be, IMO a sweet spot.

Delo XSP 5w40 has a HTHS rating of 4.2 which seems pretty stout. No complaints using it in my tuned EcoDiesel 3.0L.

 

[edyvw]

Delo XSP 5w40 has a HTHS rating of 4.2 which seems pretty stout. No complaints using it in my tuned EcoDiesel 3.0L.

It is HDEO, MB229.5 etc. will work better.

 

[chris719]

QS Euro 5w40 has 3.88 HTHS and is my favorite only second to Red Line for now. UOA pending lol.

Most likely true. To be fair, we don't know the HTHS for it since it has not been published in years and the formula has had two revisions.

 

[edyvw]

Most likely true. To be fair, we don't know the HTHS for it since it has not been published in years and the formula has had two revisions.

I think someone asked SOPUSin an email and they replied “above 3.8.” So, let’s assume it stayed the same.

 

[shortyb]

Esters and E fuel don't mix.

Forgot about that. Scratch the RL.

 

[TiGeo]

C8 Z06...0W40...

 

[WeyounDS9]

You not only have forced induction but after market extra power so that by itself is enough.
But on top of that and you are DI and you run on E85, so you are in fuel dilution territory:

A 15w-50 such as mobil 1 would not be too thick.
0w-20 is just asking for trouble.

 

[SubLGT]

Hello,

Pardon me if this has already been answered somewhere. I have a 2018 Audi S5 Sportback Prestige with 3.0L turbo DI engine. I have a larger TTE810 turbo on it along with quite a few other modifications and I run E85 blended with 91 to get an E60 blend. I am tuned with 034 Motorsport and they say the car should have about 650 wheel HP and 615 ft;lbs wheel torque both of which is about double the stock number

..........For the last ~20k miles I have been working through my stockpile of OEM Audi 0w20, which I believe is the VW 508-00 spec, but now I am out and I want to find a better oil to use.

Did you ever do a UOA on the 0W20. ?

 

[chris719]

C8 Z06...0W40...

It uses 5W-50