Octane

[Ugly John]

Is there any noticeable advantage to running 93 octane in the V6 compared to running 87?

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[zackmd1]

Is there any noticeable advantage to running 93 octane in the V6 compared to running 87?

On a stock tune you might gain about 5hp and 1-2mpg's. I personally haven't noticed any benefit to justify the $0.50 difference per gallon.

 

[Spartan]

Not in the V6 or V8.

EB lives on the 93 octane for HP. Otherwise it drops big time.

 

[V6_Mustang_2015]

I ordered the BAMA x4 and im going to have them tune it to 93 octane on stock and see the results.

 

[stangs-R-me]

The 2011-up 3.7L has knock Sensors and will adapt for higher octane fuel just as the GT & EB will adapt for lower octane fuels.

The 3.7L has a 10.5:1 compression ratio so it can and will take full advantage of higher octane fuels.

Compared to 1994-98 3.8L CR of 9.0:1 (later 3.8/3.9L engines were 9.3:1 CR), use of higher octane & a required tune did not offer as much performance increase due to the lower CR.

Doug

 

[Zeenobit]

The 3.7L has a 10.5:1 compression ratio so it can and will take full advantage of higher octane fuels.

How much of an advantage though?

 

[stangs-R-me]

How much of an advantage though?

Same as the GT's 5.0L, it's just that Ford does not market the fact.

Back in the 60's 10.5~11.0 compression engines with fixed timing required PREMIUM (usually more than 93 octane), otherwise they'd ping.

Had a friend with a completely stock 1969 Eldorodo back in the 80's ... it had a 472 c.i. V8 with 10.5:1 c.r. (SAME as 2011-up 3.7L V6). It would ping on the best Premium street gas available at the time so he would either need to baby it, reduce the timing from stock, or mix in at least 1/2 RACE GAS to keep it from pinging.

When I rebuilt the 351W 4BBL engine in my '69 Mustang, I chose to go with a more street gas friendly 9.5:1 c.r. (vs. stock 10.7:1) and it will ping if I don't run at least 91 Octane today.

So YES, the 3.7L V6 with it's 10.5:1 C.R. and knock sensors will take full advantage of what ever octane gas you choice to use.

Doug

 

[thehunterooo]

I have been running 93 in my 3.7 since I have had it, it is supposed to be a couple of extra of HP but you would never notice it, I sure don't haha.

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