Mobil 1 wins the contest...so far.

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cobos06GT

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When I first joined this site I used Castrol GTX in my mustang. I waited until it was time to change my oil and switched to Mobil 1. Car ran great, but I thought it was just my head playing tricks on me. I didn't think the oil could really make a difference.

Last weekend I changed my oil again, but to Motorcraft. I have to say after driving my car for a week, that it feels extremely sluggish on the Motorcraft compared to the Mobil 1.

Has anyone else experienced a difference like this from oil to oil using the same grade?

Anyways, I think Mobil 1 just earned my business. Wish it was cheaper though.
 
There might be a minor difference in output a couple HP at the most.

Either you've got one sensitive rump dyno or your a sucker for the placebo effect.

Just use the M1 and change it twice the interval you would conv., this way you might actually save some money in the long run.
 
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Im sure the air temp. makes a difference but it has been 50 in the morning. Car definitely feels sluggish. Maybe it is in my head, but its enough in my head for me not to use Motorcraft again.

I don't plan on going longer than 7,500 with the Mobil 1. Im probably gonna dump the Motorcraft after 3,000.
 
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Originally Posted By: hardcore302
You're feeling the difference because hotter air is less dense, therefore less power per cubic measurement of air entering your intake.


Like I said it's been 50 in the morning. Have you used M1 before? How did you like it?
 
I've used M1, RP, and many others. Never noticed an increase/decrease in power. If not the weather, maybe something else is a factor? The most you'll see from switching oils is a few HP, not really enough to "feel" anything though.

But, if you like the Mobil, stick with it. It's a quality oil.
 
Originally Posted By: panthermike
I've used M1, RP, and many others. Never noticed an increase/decrease in power. If not the weather, maybe something else is a factor? The most you'll see from switching oils is a few HP, not really enough to "feel" anything though.

But, if you like the Mobil, stick with it. It's a quality oil.


If you go by those dyno comparisons (I take them with a grain of salt), M1 usually falls well below oils like Royal Purple, Red Line, Amsoil, Nulon, etc.

I will say that my Mustang seemed to pull harder with Red Line than it did with M1 or PP.
 
You might be experiencing the 'oil placebo effect'...i.e...just because you putting in a less expensive oil (MC), you 'think' its not working as well.

Heres a suggestion; Next fill, use 60% MC and 40% Mobil 1 (same weight)...You'll have a semi-syn with about 50% syn and 50% conventional.
 
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Originally Posted By: Oregoonian
Heres a suggestion; Next fill, use 60% MC and 40% Mobil 1 (same weight)...You'll have a semi-syn with about 50% syn and 50% conventional.


Why? Instead of mixing two different oils that will produce a less than optimized additive package, why not just use Mobil Clean 7500 and get a proper synthetic blend?
 
Originally Posted By: Oregoonian
You might be experiencing the 'oil placebo effect'...i.e...just because you putting in a less expensive oil (MC), you 'think' its not working as well.

Heres a suggestion; Next fill, use 60% MC and 40% Mobil 1 (same weight)...You'll have a semi-syn with about 50% syn and 50% conventional.


Im not going try mixing oils. I just wanted to see if anyone else has felt a little difference, because I did, and so did Ben99GT. He said his car "Seemed to pull harder" with Redline.That is what I experienced with Mobil 1. Even the noise the engine makes is different at full throttle. Call me crazy if you want to.
 
Some oils provide better ring seal, and it's not hard to understand that a lower volatility synthetic should provide better ring seal than a conventional oil.
 
Originally Posted By: Ben99GT
Some oils provide better ring seal, and it's not hard to understand that a lower volatility synthetic should provide better ring seal than a conventional oil.


Can you explain volatility?
 
Originally Posted By: cobos06GT
Originally Posted By: Ben99GT
Some oils provide better ring seal, and it's not hard to understand that a lower volatility synthetic should provide better ring seal than a conventional oil.


Can you explain volatility?
 
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I have used about everything from M1, RP, schaeffers, PP, Redline, Amsoil sso,ASL,xl.

The only product my backside felt any difference with was indeed redline. I personally didn't feel any fall off between redline and PU though.
 
Most of these things are placebo and you can't substantiate the claims w/o #'s.

For example, I just refilled the Honda with M1 0w30 and to me it feels like it's smoother and a bit more power than the Synpower 5w20. I highly doubt it is though.

Oils continuously get reformulated so things can change. Some of these new oils will be using better friction modifiers.
 
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