What grade gas do you use.

[mav1178]

Originally Posted by Silverz

I have been using 87 grade for over 3+ years with no issues. 94k miles.

Anyone else use the low grade stuff? Figure I saved about $2500 in gas cost so far.

You might have saved in cost of your fillups, but the drop in efficiency would offset the savings.

Given that you posted about a cost difference of $0.60-0.80 per gallon between regular and premium, your situation is the exception and not the norm. I did some quick math:

94000 miles, $2500 gas cost savings.
At price difference of $0.60 per gallon as you mentioned, you've consumed around 4166 gallons for an average MPG of around 22.56.
Not sure what type of driving you're doing, but if it's mostly highway then that mileage really sucks.

All the gas stations in my area that have high turnover all have a spread of about $0.10 between each of the grades (87/89/91).

I'm waiting for the day when car manufacturers run out of ways to make the cars more efficient with existing fuel supplies, and start forcing the fuel industry to provide the public with 95+ octane or higher gasoline on a consistent basis. Economies of scale will reduce the cost, and we can all benefit from more power + better fuel economy.

[p1l0t]

Originally Posted by joro2

Fearing moving back to CA for a multitude of reasons, the worst (after state income tax of course) is the unavailability of 93 octane pump gas

Bring a trunk full of additives on the way back?

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[Silverz]

It shows 31 on my car now for mpg. I can get about 33-34 on straight highway but I have a heavy foot. I do a good mix of highway driving. I can’t detect any knocking.

[mav1178]

Originally Posted by joro2

Fearing moving back to CA for a multitude of reasons, the worst (after state income tax of course) is the unavailability of 93 octane pump gas

The problem is that this is an economic question, not a policy question.

CA mandates 91 octane as minimum for premium. It's up to the market to offer whatever that meets that spec (and usually the market will only offer the minimum spec).

I've been in states where advertised premium was 90 octane. That's a far worse deal than what we have here.

https://en.wikipedia.org/wiki/U.S._S...tane_Standards

[mav1178]

Originally Posted by Silverz

It shows 31 on my car now for mpg. I can get about 33-34 on straight highway but I have a heavy foot. I do a good mix of highway driving. I can’t detect any knocking.

Then either your cost estimation is way off, or your dash gauge is way off.

[Silverz]

94000 miles. 30 mpg, 0.80 difference. About $2500.

[p1l0t]

93 octane, WOT, 80000 smiles to the gallon, and just when you think she will yell the safe word she looks over her shoulder and screams harder daddy!

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[Vracer111]

...I use diesel... much torque, so efficient, such wow!

[humfrz]

I can't believe I read this whole thread -

I just fill up with the most expensive gasoline the station has to offer -


humfrz

[Dadillac]

Only 93 for me. Costs about $5 more to fill up. But I only fill up once every 2.5-3 weeks. So the additional cost is almost non existent.



Don

[guybo]

I still use 93, but my driving habits have changed and so has my MPG! I manually calculate MPG, I don't look at the MPG meter in the gauges display.

I used to do mostly highway, and when my car was stock, I got 31 MPG. Then I did intake, exhaust and tune and my MPG went down to 28. Then I got MPSS and the sticky shoes brought me down to 26 MPG.

Now I do a cold start and drive 3 miles in the AM. Then I do a cold start and drive 3 miles in the PM. This happens 4 times a week. All city. Once a week I get it warmed up on the highway for 30 mins or so. My MPG has tanked to around 20. Ugh. But I drive a hell of a lot less and I fill up about 3 times less often.

[Vracer111]

Originally Posted by humfrz

I can't believe I read this whole thread -

I just fill up with the most expensive gasoline the station has to offer -


humfrz

You're not the only one... I want my time reimbursed...LOL

[Grady]

Originally Posted by Vracer111

...I use diesel... much torque, so efficient, such wow!

Have you ever tried Jet fuel? Can't hardly keep the car on the ground it goes so fast!!

[Vracer111]

Originally Posted by Grady

Have you ever tried Jet fuel? Can't hardly keep the car on the ground it goes so fast!!

I would, but you have to tune for that.... Think I'd rather the Mr Fusion conversion... so much more potential and don't think you need to mess with tuning.