which oil is best?

5literstang · May 16, 2006

i use 5w20 in my 99 cobra...moble 1 synthetic...but it seems like it is too thin...sometimes when i check my oil it indicates that it is low, any suggestions? thanks

Sable · May 16, 2006

Do as the manual recommends and you can't go wrong.
Mobil 1 is good stuff, Royal Purple is also good. How much do you want to spend?

AdRock · May 16, 2006

My '02 seems to like the 5w-30 over the 5w-20, less noise and still runs strong. If you want sysnthetic, Mobile 1, Redline, or Amsoil are the three I like. I recently switched back to Mobil1 from Amsoil because my cost on Amsoil went up.

stng · May 16, 2006

I have always ran Mobil 1 5w-30 synthetic in all of my mustangs with zero problems... Did the 99 Cobra call for 5w-20 or 5w-30? Are you checking the oil right after you shut the car off, because I think the Cobra comes with a windage tray stock and it may take a little longer for the oil the drain back into the crankcase. I have also noticed with the mobil one sythetic it seems to be more prone to burn a little. All of my mustangs have used a little oil when I switched to mobil 1. Dont know why, no smoke or anything...
I dont know if I would ever use 10w-30 on a 4.6, if you have ever had the valve covers off you will notice how small the return oil valleys are...

Outlaw97GT · May 16, 2006

Oh no here we go again with the oil war..

DTNODYA · May 16, 2006

I use Mobil 1 Full Synthetic in my truck but I have found that my Mustang 'likes' Motorcraft synthetic. It doesn't burn hardly any and the engine seems to run smoother with the Motorcraft synthetic than Mobil 1. FWIW, I have always used 10w-30 in my 98 GT. 5w seems too thin to me ... -my opinion-

deftsound · May 16, 2006

castrol gtx high mileage

stroked4.6 · May 16, 2006

Ive used Royal Purple and didnt notice any differance but $7.00 per qt. Now I've got a 7qt pan so no more royal purple for me. Cant go wrong with Motorcraft. I'm putting a blower on now and I heard full-synthetic oil should not be used with a blower application because of blow-by. Motorcraft 5W-30 all the way!!

fluffyrunnells · May 16, 2006

are we supposed to change that or something..???

personaly i go with the 8w-5 but what the hell do i know. it runs just fine..

Kilgore Trout · May 16, 2006

Oil is a matter of personal preference.

Pennywise2 · May 16, 2006

Mobil 1 synthetic

QuickCapri83 · May 16, 2006

Been using 10W30 Royal Purple for as long as I can remember. In my 5.0's that I had, my '97 VR6 GTI (very highly modded car) and now in my present car the 35th limited. I use K&N oil filters also, although I would use a dealer one too, the two seem best to me. Anyways no problems ever. The 4.6 can take 10W30 without question, IMO. My car has 108k on it, and I have plenty of fun with it, so, if it were a problem i'd probably be the first to know

5literstang · May 18, 2006

it calls for 5w 20....but has anyone used 5w 30 in the dohc?

COBRA90GT · May 18, 2006

5literstang said:
it calls for 5w 20....but has anyone used 5w 30 in the dohc?

Yes, many people have.

IIRC, starting in 2001, Ford made the recommendation to switch to 5w-20 in their engines. Reason? CAFE. A fancy moniker for Corporate Average Fuel Economy. It's meaningless to consumers, but if you are a manufacturer, it saves you money if your fleet of vehicles can have a higher miles per gallon rating (or something to that effect). The *slightly* thinner 5w-20 oil helps fuel economy ratings and therefore raises Ford's CAFE rating.

Still with me? Bottom line is that you can run 5w-20 or 5w-30 oil. It doesn't matter. The '99 and '01 DOHC engine are essentially the same (ie - no different tolerances or any of that mumbo jumbo).

I have used 5w-30 oil and suffered no ill effects even though my '01 calls for 5w-20. It's more important to keep tabs on your oil level on a regular basis and make sure you change your oil/filter accordingly.

Dragstr05 · May 18, 2006

Outlaw97GT said:
Oh no here we go again with the oil war..

Seriously. If you change your oil regularly like most people on here do (well I hope anyway), then synthetic probably provides little or no benefit unless you're racing the car on a regular basis. Motorcraft does just fine for me. Its the only oil I've used since I got the car.

Calidude · May 18, 2006

... my stang seems to like the Motorcraft 5W-20 synthetic blend. But I like the fact that it's less than 10 bucks for a 5 quart jug at WallyWorld- so I can stick to my regular 3000 mile oil/filter change interval.

5literstang · May 18, 2006

im goin to try 5w 30, thanks guys

Outlaw97GT · May 18, 2006

Dragstr05 said:
Seriously. If you change your oil regularly like most people on here do (well I hope anyway), then synthetic probably provides little or no benefit unless you're racing the car on a regular basis. Motorcraft does just fine for me. Its the only oil I've used since I got the car.

That is what I use also, Motorcraft synthetic blend 5w30 with a Wix or Motorcraft oil filter.

mustangman9812 · May 19, 2006

Castrol 5-30 with a Motorcraft FL820 filter = best

which oil is best?

5literstang

New Member

Sable

New Member

AdRock

Member

stng

New Member

Outlaw97GT

Member

DTNODYA

Member

deftsound

Please ask me how much my supercharger cost

stroked4.6

Member

fluffyrunnells

New Member

Kilgore Trout

Fried or Broiled ?

Pennywise2

Banned

QuickCapri83

New Member

5literstang

New Member

COBRA90GT

Mustang Master

Dragstr05

New Member

Calidude

New Member

5literstang

New Member

Outlaw97GT

Member

mustangman9812

Similar threads

which oil is best?

New Member

New Member

Member

New Member

Member

Member

Please ask me how much my supercharger cost

Member

New Member

Fried or Broiled ?

Banned

New Member

New Member

Mustang Master

New Member

New Member

New Member

Member

Similar threads

Privacy & Transparency

Privacy & Transparency