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Old 08-29-2003, 12:32 AM
sfloriII's Avatar
Still pedaling...
 
Join Date: Aug 2003
Location: Northern VA
Posts: 1,614
Exclamation Will mid-grade gasoline hurt my engine?

[I did read the fine thread a few lines down that's similar to this. I guess I really just need to know if the engine will be okay. It's a '95 E-320 with the 104 engine.]

After working a twelve hour day and then going to the gym, I was too tired to realize that I filled the tank of my E-320 almost all the way up with mid-grade gasoline. (This station had the premium in the middle and the mid-grade on the right, DUH!) I then topped it off with a few gallons of high-test.

I'd say the ratio in the tank now is 75% mid-grade and 25% premium.

Is there any cause for concern? Should I have the tank drained? If not, should I drive in a certain way to prevent any damage?

Thanks for any help!
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2016 Hyundai Santa Fe Sport (wife's).

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2006 Jetta TDI 135,970 miles. Sold Nov. '13.
1995 E-320 Special Edition. 220,200 miles. Sold Sept. '07.
1987 190-E 16 valve. 153,000 miles. Sold Feb. '06.
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Last edited by sfloriII; 08-29-2003 at 12:39 AM.
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  #2  
Old 08-29-2003, 05:55 AM
Registered User
 
Join Date: Jan 2003
Location: USA
Posts: 699
Dear sfloriII:


There's nothing to worry about. Your car definitely has a knock sensor which automatically adjusts the firing timing. NO damage will be done.


Eric
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  #3  
Old 08-29-2003, 09:39 AM
I told you so!
 
Join Date: Jun 2002
Location: Motor City, MI
Posts: 2,790
Ditto. You can go down to 87 octane and still be okay.
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  #4  
Old 08-29-2003, 11:14 AM
G-Benz's Avatar
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Join Date: Apr 2001
Location: Dallas/Fort-Worth
Posts: 5,711
You are okay.

If you haven't attempted that performance tip where you can reset your timing over what was set at the factory (based on the use of lesser-grade octanes), there will be no harm done.

Plus, I find that when I'm stuck in a rural area for an extended period, sometimes I can't get much better than 87 or so...and I'm NOT puttin in that "gasahol" or whatever them "corn-squeezins" mixture is!
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