What is your MPG on the 328?

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glyndon maryland
#3
22.6 constant, unsure of my city-to-highway consumption tho, but accoring to the consume feature I have been getting 22.6 running on 93 octane, and once a month on 94 octane
 
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Location
bee
#7
To be honest...

I did notice a big difference after I replaced the spark plugs. I have never refueled with a lower octane than 91. I didn't notice too much difference using our Sunoco Ultra 94 gas up here in Toronto. Although my Twinturbo Z gets nothing but 94.
For some reason I am only getting 18mpg combo highway/city driving and I only have 43K on the clock. I have given it a recent tune up. Is there anywhere else I should check?

My Toy 95 said:
Do you guys see much difference in how the car runs on 93 octane vs. the required 89?
 
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323
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Location
Texas
#8
higher octane burns faster and more efficently, thats the olny real advantage. a product of this would result in cleaner parts inside the engine, thus sustaining the life of it
 
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Location
Ohio
#10
I drive a lot of back roads with a lot of hills and I still get about 23-24 city. The ODC says 24.5 but that includes some freeway driving.
 
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287
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Location
Fort Worth, TX
#11
Here in Fort Worth i am avg'ing 27.5 to 28.3 combined city and mostly highwary.
The 27 mpg is when i do mostly expressway driving at 80 mph.

But as i am installing an RMS Super Charger w/Stage 2, i do believe i will be giving up the great milage for speed.
 
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42
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Location
Orono, ME
#15
I got 29.4 on a recent 230 mile trip, was trying my hardest to ease it to 30, but 29.4 was the highest avg it would get. I get like 17 mpg if I only go the 1.5 mile commute to work. I run the factory suggested 89 octane.
 


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