Best oil for a paxton supercharged mustang

[Yellow]

Hi
I am wondering what is the best oil for a paxton supercharged mustang running E85 fuel. And is changing oil every 5k miles is ok since I am running E85? My car has a 750whp.
Thanks in advance.

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[sigintel]

http://www.fordservicecontent.com/Ford_Content/Catalog/owner_information/2015-Mustang-Owners-Manual-version-1_om_EN-US_07_2014.pdf

http://www.*******************/forums/showthread.php?805918-Official-GT-5-0-Boss-302-UOA-thread

http://www.bobistheoilguy.com/motor-oil-101/

Dunno, but... Maybe we can get a Ford engineer to weigh in.

If you run CHTs well below stock via colder thermostat, then you are more likely to have oil with viscosity way higher than designed (too thick, ie oil starve bottom end) even cruising around town. If you bump to 5W30 you could make the situation even worse. Keep in mind these engines have built in oil coolers so it is very difficult to get very far above the coolant temp. Cold tstat and non synthetic 10w30 is asking for damage during warm up especially if WOT with FI.

Running a colder tstat or thicker oil or BOTH can reduce flow and lubrication effectiveness during the critical first 20 minutes of a commute when you likely want to get into it or light up an on ramp.
Full synthetic 5w20 FTW for better start up protection when damage is much more likely.

Also, your cam phasers were designed to run at stock CHT on 5W20. Most tuners have already run into high cam phase uncertainty from cold tstats and/or wrong oil weight and they have to pull power.

FWIW, Im running a mixture of mouse spit, ear wax, vodka and alien gwank gism mixed 60/39 with Mobile1 5w20.

 

[Yellow]

Im running Mobil 1 5w20 full synthetic and I am wondering do I need a thicker oil or mine is good.

 

[Yellow]

http://www.fordservicecontent.com/Ford_Content/Catalog/owner_information/2015-Mustang-Owners-Manual-version-1_om_EN-US_07_2014.pdf

http://www.*******************/forums/showthread.php?805918-Official-GT-5-0-Boss-302-UOA-thread

http://www.bobistheoilguy.com/motor-oil-101/

Dunno, but... Maybe we can get a Ford engineer to weigh in.

If you run CHTs well below stock via colder thermostat, then you are more likely to have oil with viscosity way higher than designed (too thick, ie oil starve bottom end) even cruising around town. If you bump to 5W30 you could make the situation even worse. Keep in mind these engines have built in oil coolers so it is very difficult to get very far above the coolant temp. Cold tstat and non synthetic 10w30 is asking for damage during warm up especially if WOT with FI.

Running a colder tstat or thicker oil or BOTH can reduce flow and lubrication effectiveness during the critical first 20 minutes of a commute when you likely want to get into it or light up an on ramp.
Full synthetic 5w20 FTW for better start up protection when damage is much more likely.

Also, your cam phasers were designed to run at stock CHT on 5W20. Most tuners have already run into high cam phase uncertainty from cold tstats and/or wrong oil weight and they have to pull power.

Thanks for the helpful reply.

 

[ATTFighter]

I'm running 5w-50 full synthetic, I'm Paxton charged in FL.

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[sonic]

Curious if any vendors chime in on this topic

 

[Roh92cp]

I agree would be nice to here if the vendors or SC manufactures have an opinion or have done any testing.

 

[beefcake]

5 20

 

[clean92lx]

Dang I just did first oil change and went with 5w30 but car is pretty stock minis E85 tune. Should I be worried? Or change the oil again and go back to 5w20?


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[Barrel]

Dang I just did first oil change and went with 5w30 but car is pretty stock minis E85 tune. Should I be worried? Or change the oil again and go back to 5w20?


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You're likely fine. Plenty of guys running that weight with boost.

 

[Roh92cp]

I talked with Whipple and they said all their durability testing was done with stock motorcraft 5-20 oil and it held up well. He recommend staying with the stock oil and said he would be concerned if other oils were used.

 

[Barrel]

Well oil is cheap. If I were concerned about it I would just drop the oil and throw in the weight I thought was best. I'm filling with RP 5-20 this weekend.

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