Need oil suggestions

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I have three different cars and I from what I've been reading here; they might all need a different oil.

The first one is my 2004 Mustang Cobra. I wasn't sure wheter I needed to repost this in the racing forum due the shear power the engine produces with the supercharger. The engine is making 800 horsepower at the flywheel give or take. It is hard to say because I only know rear wheel horsepower numbers. I drive the car around town maybe 10-20 miles at a time. I often drive the car hard. The engines tolerances are setup for the street. I've always run Mobil 1 5w20 in the car but I wouldn't hesitate to switch if there was a better suited oil for my application.

The second car is my 1996 Mustang Cobra. This car is mostly stock with somewhere in the 320 horsepower range. I still drive this car hard. It has 130k on the odometer. It has had Mobil 1 5w30 in it since 1998. 5w30 is what Ford recommends. Milage put on this car is comparable to the 2004 Cobra

The last car is my wife's Nissan Maxima. Nissan recommends 5w30 for this car too. This car is what usually has most miles put on it. We take it everywhere. I usually run Mobil 1 synthetic in it also but I do put cheap oil in it every once in a while.

Do all synthetic oils have similar cleaning characteristics? I'm not looking for the cheapest oil either. I really want to run the best oil that will provide the best protection at 15k oci. I will change the first few oil changes earlier than that though on the maxima since it has had conventional oil in it about 30% of the time.

I also understand that the oil is just one part of the equation. For that reason I also have a filter thread in the filter forum.
 
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IMO...stay with the synthetic that's been working for you all these years. 15k is too far. 7-9k range. What you been using is good for that.
 
Pennzoil Ultra 5w30 in all 3 and be done with it. Seriously.
At the moment it could well be the best buy 5w30 on the market in the circa $30 5qt price class. PAO/GTL no GPIII.
No where near to heavy for anything your running either.
 
I notice a lot of folks here love PU. I have a huge stigma with Pennzoil. Several (3) engines I've taken apart that had Pennzoil Conventional oil run in them religiously were full of black tar. Just nasty. I know, I know, the synthetic isn't even a comparison.
 
Will Redline or Amsoil last longer than 7-9k miles?

LeakySeal,

I noticed your running Pennzoil platinum in one car and M1 in the other. Does Pennzoil make a better oil for lower milage cars than M1 and M1 make better high milage oil than Pennzoil?
 
Well, you will get alot of opinions about 5w20 not being good enough for high horsepower enignes. My buddy has a 2003 cobra making 530 at the wheels and it gets 5w20 synthetic oil (whatever is on sale). I also had a 2007 GT making 340 at the wheels and I used 5w20. Making that much power I might go up to a heavyer weight, that engine pumps out some serious heat even with a larger intercooler and radiator. But, i'm sure the 5w20 isnt doing any harm.
 
Originally Posted By: MuzzleFlash40
Well, you will get alot of opinions about 5w20 not being good enough for high horsepower enignes. My buddy has a 2003 cobra making 530 at the wheels and it gets 5w20 synthetic oil (whatever is on sale). I also had a 2007 GT making 340 at the wheels and I used 5w20. Making that much power I might go up to a heavyer weight, that engine pumps out some serious heat even with a larger intercooler and radiator. But, i'm sure the 5w20 isnt doing any harm.


You make a good point. One that I hadn't really thought about. I've always just run what Ford recommended from the factory. However, I've obviously gone out of the parameters of how the engineers intended it to be used.
 
Well, I did forget to mention that I switched the 2004 Cobra over to RL three oil changes ago. RL is available but I have to drive 30 minutes to get it versus 2-5 minutes to get amsoil or 5-10 minutes to get M1 or PU.

However, I only switched to RL because the local speed shop said it was the best. There was no actual fact based decision formulated...imagine that.
 
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