Mobil1 & First Posting

[RobbS]

I have read many threads and recommended tons of people to the site for years. This is my first post. I own 2 Mustangs. The 3.8L V6 has 300,000 miles on it. The 4.6 Cobra has 73,000 miles on it. I have only used 5W-30 Mobil1 ES oil in my vehicles. Last oil change I decided to put Mobil1 High Milage in the V6. My question: My first oil change with the Cobra is coming up, (previous owner only used Motorcraft semi-synthetic)and I planned on using Mobil1 High Mileage.
-Go with Mobil1 HM or Mobil1 ES??

 

[Quattro Pete]

What's "ES"?

Anyway, I wouldn't switch to HM oil unless you're having a problem with oil leaks maybe.

 

[285south]

I think he meant Mobil 1 "Extended Performance" and not ES.

 

[autodetailer]

go with Mobil 1 extended performance for you cobra i would not use Hm oil in a car with that many miles unless it leaked or burnd oil bad

 

[Donald]

+1 on the waiting for HM oil until until its needed (and then some).

 

[gfh77665]

Use M1 EP in the new Cobra for 5000 miles, then drain it and reuse it in the 300,000 mile Mustang for another 5,000 miles.

 

[electrolover]

Originally Posted By: Donald
+1 on the waiting for HM oil until until its needed (and then some).

76k is nothing. Wait a while

 

[aquariuscsm]

M1 HM is a good oil via VOA. Shows to have a higher TBN and a stronger add pack. I've used M1,EP,and HM and the HM ran the smoothest of them all. I'm guessing the HM additive is something as simple as an ester.

 

[Danh]

You didnt say what year the Cobra was but keep in mind Mobil1 HM is "SL" rated. If your Cobra is a 2005 or later it will be spec'd for SM or SN. And of course M1 HM is not available in 5w/20, which is specified for most 2000+ Fords.

Many here would say it doesn't matter, but just to be sure youre aware.

 

[RobbS]

Thank you everybody. Yes, I meant to say Mobil1 Extended Performance. The Cobra is a 1996 4.6 DOHC (73K miles). I had read that the high mileage version of Mobil1 had a great additives package. I will surely use the Extended Performance over the High Mileage if that is the consensus.

 

[aquariuscsm]

RP 5W20 HPS would be a good oil for your Cobra.

 

[RobbS]

In addition, as a FYI-
*Both Mustangs use Mobil 1 engine oil, Mobil 1 transmission fluid, Amsoil differential gear fluid, K&N or Mobil1 oil filters, Militec-1, all exclusively.

 

[randomhero439]

Redline 5w-20. Dont let the 20 grade fool you, its thicker than Mobil 1 5w-30 EP.

Superior additives, however its better suited for ~5k-7k drains

 

[RobbS]

Originally Posted By: aquariuscsm
RP 5W20 HPS would be a good oil for your Cobra.

I am open to suggestions, that's why I'm here. I bought the car 2 weeks ago. It will be my first oil change for the car coming up and I plan to stick with what I choose is best for this engine, which I have never run before.

 

[Brons2]

Originally Posted By: RobbS
Thank you everybody. Yes, I meant to say Mobil1 Extended Performance. The Cobra is a 1996 4.6 DOHC (73K miles). I had read that the high mileage version of Mobil1 had a great additives package. I will surely use the Extended Performance over the High Mileage if that is the consensus.


Your OHC engine does not need the extra ZDDP in M1HM like a non-roller (flat tappet) OHV engine would. M1EP would be a fine choice.

 

[BillyTheKid]

Originally Posted By: randomhero439
Redline 5w-20. Dont let the 20 grade fool you, its thicker than Mobil 1 5w-30 EP.

Superior additives, however its better suited for ~5k-7k drains


And an insane price tag. I also question the extended drains. I think it is good stuff but mroe for a racing application.

 

[tig1]

Since you know from experience the quality of M1 oils, I would stick with the EP variety. What is your OCI?

 

[aquariuscsm]

There's a really good Mustang thread here someplace where they compared M1 and RP. Not sure if it was a Cobra or not,but he'd probably be a good member to chat with about your car.

 

[RobbS]

Thank you. I am changing it every 7500+ miles or 5 months. The Extended Performance has done me right in all of my other vehicles over the years. Things change with oil technology I know, always want to hear opinions especially in regards to engine specific experience. Thanks again.

 

[Challenger71]

I would concur. The add-pack is quite nearly on-par with EP. Excellent choice for either vehicle.

Originally Posted By: aquariuscsm
M1 HM is a good oil via VOA. Shows to have a higher TBN and a stronger add pack. I've used M1,EP,and HM and the HM ran the smoothest of them all. I'm guessing the HM additive is something as simple as an ester.