Any problem running 15w-50 Mobil 1 in my 2008?

[Flash1034]

I got a good deal on bulk Mobil 1 15w-50 Motor oil. Any problems running that oil in my 2008 Viper?

Thanks,

Flash

 

[mjorgensen Woodhouse]

SRT recommends the 15/50 for any track use but does not think it is good for the street in cold start situations from what I have been told.

 

[ViperCr8zy]

I didn't bite on the Advanced Auto deal beacuse they don't stock 5W 50 Mobil 1, and ended up paying full boat for Castrol 5W 50 which they do stock. It's for my GT500, but when you lay out the long green for the car, I figure it's best to go with exactly the weight that the factory recommends. Pennies on the dollar, comparatively speaking.

 

[SoCal Rebell]

Here in SoCal, 15-50 works just fine, even in Gen 2s.

 

[SRT Engineers]

This question has come up a few times on this forum with some misinformation being passed along - Just for the record; 15W-50 will work fine in the 2008 engine. The only downside might be a slight drop in fuel economy (0.2 to 0.5 mpg if you can measure it or if you care!). The 0W-40 oil was selected primarily for the slight fuel economy improvement it offers and its broader operating range when compared to the older 5W-30 or 10W-30 oils. The 0W-40 is a superior product when compared to the 5W or 10W-30 oils.

The only caution is as Mark stated, make sure the 15W-50 is up to operating temperature in cool or cold climates before you run any moderate or high engine speeds (good advice in any case!). In some instances, the 15W-50 can actually improve cam control in new engines when the cam and valvetrain friction is high (for example use 15W-50 for the first oil change and the 0W-40 thereafter). The higher viscosity and shear strength improves hot oil pressure and provides more control force for the VVT system as a result. Certainly use the 15W-50 if you are on track often or in high temperature climates. Hope this clears up this question!

 

[Flash1034]

Thanks for the replies... I think Ill give it a try.

Flash

 

[JonB]

PROOF POSITIVE that these guys LURK here...and that they give a damn....... Thanks

]This question has come up a few times on this forum with some misinformation being passed along - Just for the record; 15W-50 will work fine in the 2008 engine. The only downside might be a slight drop in fuel economy (0.2 to 0.5 mpg if you can measure it or if you care!). The 0W-40 oil was selected primarily for the slight fuel economy improvement it offers and its broader operating range when compared to the older 5W-30 or 10W-30 oils. The 0W-40 is a superior product when compared to the 5W or 10W-30 oils.

The only caution is as Mark stated, make sure the 15W-50 is up to operating temperature in cool or cold climates before you run any moderate or high engine speeds (good advice in any case!). In some instances, the 15W-50 can actually improve cam control in new engines when the cam and valvetrain friction is high (for example use 15W-50 for the first oil change and the 0W-40 thereafter). The higher viscosity and shear strength improves hot oil pressure and provides more control force for the VVT system as a result. Certainly use the 15W-50 if you are on track often or in high temperature climates. Hope this clears up this question!

 

[Viper X]

Bob,

I've been running Mobil 1 15w50 in my GTS (track car) and my Supercharged SRT-10 for a couple of years now - no issues.

It really doesn't get cold enough here in So Cal to matter.

Best prices seem to be Wal Mart.

Dan

 

[ViperCr8zy]

Excellent! SRT Engineers - what's your take on the 5W 50 synthetic oils, then for the Viper - would it be the best of both worlds? Also, a lot of old school muscle car drag guys are running diesel oils around here for the zinc content. Thoughts on them, please? Thanks!

 

[JonB]

I got a good deal on bulk Mobil 1 15w-50 Motor oil.......

good deal? SPILL !!!

My first chat with Herb H in early 93 was about 15-50.... been using it ever since.

 

[Shandon]

All I ever run is Motul 15/50 300V oil. It will cost you though!! Highly recommended by Viperdays also!

 

[Grant]

Certainly use the 15W-50 if you are on track often or in high temperature climates. Hope this clears up this question!

Awesome info, thanks! I was worried 15w50 might cause too much cold-start wear for street use.

What I'm wondering is if its still necissary or wise to use a 50-weight oil if you are running something like Motul or Redline, which have much higher HTHS (high temperature high sheer) ratings than M1?

Some data:
0w40 M1:
Viscosity @ 40C: 78.3 cSt
Viscosity @ 100C: 14 cSt
HTHS: 3.7 mPa•s @ 150ºC

5w40 Redline:
Viscosity @ 40C: 94 cSt
Viscosity @ 100C: 15.1 cSt
HTHS: 4.6 mPa•s @ 150ºC

5w40 Motul 300V:
Viscosity @ 40C: 80.8 cSt
Viscosity @ 100C: 13.8 cSt
HTHS: 4.51 mPa•s @ 150ºC

15w50 M1:
Viscosity @ 40C: 131.2 cSt
Viscosity @ 100C: 18.1 cSt
HTHS: 4.5 mPa•s @ 150ºC

15w50 Redline:
Viscosity @ 40C: 138 cSt
Viscosity @ 100C: 19.6 cSt
HTHS: 5.8 mPa•s @ 150ºC

15w50 Motul 300V:
Viscosity @ 40C: 128.1 cSt
Viscosity @ 100C: 17.8 cSt
HTHS: 5.33 mPa•s @ 150ºC

Redline is more viscous than M1 for the same weight rating (a "40 weight" oil actually signifies a range of possible viscosities). Motul is less viscous, but still has great HTHS ratings. HTHS is supposedly the best indicator of wear resistance in bearings and cylinder walls, so it looks like M1 (while good compared to normal oils) just doesn't stack up against more expensive synthetics.

 

[eucharistos]

PROOF POSITIVE that these guys LURK here...and that they give a damn....... Thanks

You beat me to this comment Jon

thanks SRT Engineers

 

[Racer Robbie]

This question has come up a few times on this forum with some misinformation being passed along - Just for the record; 15W-50 will work fine in the 2008 engine. The only downside might be a slight drop in fuel economy (0.2 to 0.5 mpg if you can measure it or if you care!). The 0W-40 oil was selected primarily for the slight fuel economy improvement it offers and its broader operating range when compared to the older 5W-30 or 10W-30 oils. The 0W-40 is a superior product when compared to the 5W or 10W-30 oils.

The only caution is as Mark stated, make sure the 15W-50 is up to operating temperature in cool or cold climates before you run any moderate or high engine speeds (good advice in any case!). In some instances, the 15W-50 can actually improve cam control in new engines when the cam and valvetrain friction is high (for example use 15W-50 for the first oil change and the 0W-40 thereafter). The higher viscosity and shear strength improves hot oil pressure and provides more control force for the VVT system as a result. Certainly use the 15W-50 if you are on track often or in high temperature climates. Hope this clears up this question!

What would your choice be for the 2003 SRT-10 Vipers that call for the older 10W-30 Mobil 1 oil. Would you use the new 0W-40 or go withn 15W-50?

Thanks in advance,