Oil & viscosity for supercharged application

[03Marauder]

I have an '03 Marauder with Ford's 4.6L mod motor (aluminum block) which specs 5W-20 oil. I have just under 91k miles and two weeks ago installed a non-intercooled Novi supercharger (the self-lubricated model, so the oil pan was not tapped and the car's oil does not flow through the SC). The car has had Mobil 1 5W-20 for most of its life. I tried Royal Purple recently too. I currently have Mobil 1 0w30 in the car since FL summers are so hot. I also have a remote dual oil filter setup from Summit, not the bypass kind. I have two Motorcraft FL1A's installed. No oil consumption between changes, typical OCI is 5k.

Questions: should I run a 0W-40 or 5W-40 in the car due to the higher temps and load from the forced induction? Should I run a diesel HDEO oil? Should I stay with synthetics? TIA for your advice.

 

[MGregoir]

I would run Mobil 1 0W-40 or Castrol Syntec (German) 0w30 and I am sure you would be well protected in that application.

ACEA A3 rated synthetic 30 or 40 weight.

 

[Shaman]

What does the 03 cobra run? I would think that would be the easiest way to determine what to run.

 

[OVERKILL]

RP doesn't seem to perform that well in high HP applications as per a recent UOA on here. An HDEO seems to offer much better protection.

 

[JustinH]

The 03 cobra is a different motor than this guys marauder.

The factory tune of a 03 cobra probably isn't rich like this guy's is with an aftermarket blower..

I would take a look at 5w40 delo synthtic or 0w30 delo...

You will want a robust oil to fight dillusion.

Did you have this thing tuned on a dyno?

I had a 96 tbird that we put a 01 bullitt mustang motor in it, with a vortech blower. It needed the diesel motor oil in it.

 

[OVERKILL]

Depends on who tuned it as to if it's rich or not. A good SCT tune will have it driving like stock.

It's definitely not like the Termi inside though, which had forged rods, forged pistons, forged crank in the truck (iron) block and can handle over 1,000HP.

I agree with the HDEO recommendation.

 

[rg200amp]

The Marauder allready had a supercharger on it stock. so if 5w20 is good for the stock one, I cant see it not being good for the new one.

The ford modular motors like the thin weight. The ford guys allways say it needs the thin weight so it can get all up in the tight places, and for the timing chain tensioners.
(what I heard)

I would stick to a good synthetic 5w20.

when i had my f250 with the 6.8L V10 modular, i searched alot on superchargers. all the guys who had one on theres stuck with 5w20 motorcraft.

 

[OVERKILL]

The Marauder is not a forced-induction engine stock. It has the 4.6 DOHC engine out of the earlier Cobra ('99) which is 320HP but makes less power than that (302HP) because of the exhaust or tune if I remember correctly.

It has forged cracked-powder rods and hypereutectic pistons.

 

[rg200amp]

You are right, im sorry.

I thought one of the two gauges were boost, turns out hey are oil pressure and volts!!!!

 

[OVERKILL]

Originally Posted By: rg200amp
You are right, im sorry.

I thought one of the two gauges were boost, turns out hey are oil pressure and volts!!!!


No prob, I'm a Ford nut

 

[03Marauder]

Overkill is correct, the motor's internals are not forged, they are cast. I had it dyno tuned today. Here's the link to the results:
http://vmptuning.com/forum/showthread.php?p=2084#post2084

The A/F ratio runs 11-12 throughout most of the RPM range. Also, since the SC is not intercooled. the intake air temps run into the 140's and 150's during midday summer heat, without even getting into the throttle much.

 

[JustinH]

Originally Posted By: OVERK1LL
The Marauder is not a forced-induction engine stock. It has the 4.6 DOHC engine out of the earlier Cobra ('99) which is 320HP but makes less power than that (302HP) because of the exhaust or tune if I remember correctly.

It has forged cracked-powder rods and hypereutectic pistons.


Nah, its not a cobra motor.

It is more similar to the aviator suv motor, and the mustang mach1 motor..

 

[RF Overlord]

JustinH is correct ^^^

03Marauder, be careful running a thicker oil in a modular motor with stock 4V heads. I wouldn't run anything thicker than a 30 in there, and even then I would stick with a thinner 30 (no GC). I use Pennzoil Platinum 5w30 in both my blower car and in the mildly-modded daily driver.

 

[zulu]

Non-Intercooled=HEAT

I'd definately run an 40W of some sort, or at least a heavy 30W like GC. Rotella/Delo would also be a really good choice, but I'd still stick with the 40W.

 

[mpersell]

I would think you'd want to pick a high HTHS 30wt like a 10w30 that also has a low NOACK or evaporation quality. Also find some way to get some cooler air down the intake. Maybe re-route the intake path.

 

[OVERKILL]

Originally Posted By: JustinH
Originally Posted By: OVERK1LL
The Marauder is not a forced-induction engine stock. It has the 4.6 DOHC engine out of the earlier Cobra ('99) which is 320HP but makes less power than that (302HP) because of the exhaust or tune if I remember correctly.

It has forged cracked-powder rods and hypereutectic pistons.


Nah, its not a cobra motor.

It is more similar to the aviator suv motor, and the mustang mach1 motor..


Aviator motor is very similar to the Cobra motor internals-wise. I think it's just the cams that differ between the "versions" of this engine from the Mark VIII, Aviator, Cobra, Marauder, Mach 1....etc.

Obviously there are some other differences between the implementations of the engine with things like the intake and whatnot.

The Termi motor is the "different" one of the bunch. Different heads, rods, pistons, block....etc.

 

[Jaymus]

It also depends on how you are going to drive it. Is it going to have the occasional WOT here and there? Or is it going to be dogged on for an hour straight at a track?

If you want a shear stable oil, GC fits that bill, but I won't talk about it too much, people may think I'm a fanboy of it. I just like it for it's shear stability and it's a thick 30 weight.

 

[JustinH]

Originally Posted By: OVERK1LL
Originally Posted By: JustinH
Originally Posted By: OVERK1LL
The Marauder is not a forced-induction engine stock. It has the 4.6 DOHC engine out of the earlier Cobra ('99) which is 320HP but makes less power than that (302HP) because of the exhaust or tune if I remember correctly.

It has forged cracked-powder rods and hypereutectic pistons.


Nah, its not a cobra motor.

It is more similar to the aviator suv motor, and the mustang mach1 motor..


Aviator motor is very similar to the Cobra motor internals-wise. I think it's just the cams that differ between the "versions" of this engine from the Mark VIII, Aviator, Cobra, Marauder, Mach 1....etc.

Obviously there are some other differences between the implementations of the engine with things like the intake and whatnot.

The Termi motor is the "different" one of the bunch. Different heads, rods, pistons, block....etc.


The aviator motor uses the 2v rods, they are junk. Ford had problems with this motor meeting durability standards in stock configuation. It was a cost savings measure.

If you are going to boost one of these motors, then at least put rods and bearings in it.

 

[OVERKILL]

Originally Posted By: JustinH
Originally Posted By: OVERK1LL
Originally Posted By: JustinH
Originally Posted By: OVERK1LL
The Marauder is not a forced-induction engine stock. It has the 4.6 DOHC engine out of the earlier Cobra ('99) which is 320HP but makes less power than that (302HP) because of the exhaust or tune if I remember correctly.

It has forged cracked-powder rods and hypereutectic pistons.


Nah, its not a cobra motor.

It is more similar to the aviator suv motor, and the mustang mach1 motor..


Aviator motor is very similar to the Cobra motor internals-wise. I think it's just the cams that differ between the "versions" of this engine from the Mark VIII, Aviator, Cobra, Marauder, Mach 1....etc.

Obviously there are some other differences between the implementations of the engine with things like the intake and whatnot.

The Termi motor is the "different" one of the bunch. Different heads, rods, pistons, block....etc.


The aviator motor uses the 2v rods, they are junk. Ford had problems with this motor meeting durability standards in stock configuation. It was a cost savings measure.

If you are going to boost one of these motors, then at least put rods and bearings in it.


ALL of the mod motors with the exception of the Termi and Lightning engines use the forged cracked-powder rods, which are not safe for anything north of ~450RWHP.