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  #25  
Old 02-19-2014, 01:31 AM
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Re: Octane rating for the SRT ?

@Mattando - Are you going to flush the tank completely to replace it with 98 ? Or just top it up like normal ? I know for a fact I think that mixing two octane ratings is bad for the engine.
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  #26  
Old 02-19-2014, 02:04 AM
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Originally Posted by DarkHue View Post
@Mattando - Are you going to flush the tank completely to replace it with 98 ? Or just top it up like normal ? I know for a fact that mixing two octane ratings is bad for the engine.
Where did you hear that mixing octanes is bad for your engine? Although it is not good to use octane lower or higher than what is recommended, mixing 92 and 93 octane gad will cause no issues, especially if one tankfull.
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Old 02-19-2014, 02:07 AM
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Quote:
Originally Posted by DarkHue View Post
@Mattando - Are you going to flush the tank completely to replace it with 98 ? Or just top it up like normal ? I know for a fact that mixing two octane ratings is bad for the engine.
Why is it bad to mix different octane gas? I thought it just averages out between the two? No?
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  #28  
Old 02-19-2014, 02:10 AM
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Re: Octane rating for the SRT ?

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Originally Posted by YjagetaJeep View Post
Where did you hear that mixing octanes is bad for your engine? Although it is not good to use octane lower or higher than what is recommended, mixing 92 and 93 octane gad will cause no issues, especially if one tankfull.
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Why is it bad to mix different octane gas? I thought it just averages out between the two? No?
I am not sure personally (just noticed I said "I know for a fact", oops) . I heard that one shouldn't mix them in the fuel tank, as it's bad for the engine and pipes all the way to the exhaust. Even the dealer said so BS ?
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Old 02-19-2014, 02:43 AM
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Re: Octane rating for the SRT ?

Mixing octanes causes no harm, so long as you put the required octane specified for your country at a minimum, any higher the octane the better.

NOW....throwing ethenol in the tank would be bad
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  #30  
Old 02-19-2014, 02:45 AM
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Re: Octane rating for the SRT ?

@mrmaker - Thanks for the info. I seem to have been misinformed regarding this then.
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  #31  
Old 02-19-2014, 02:47 AM
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Re: Octane rating for the SRT ?

(incase someone missed the edit on the first page)



Source : http://www.drivesrt.com/assets/docs/2014/2014-Grand-Cherokee-SRT-Specifications.pdf

It says the compression ratio is 10.9:1, where some online sources recommend 93 Octane AKI / 97 RON for such specification.
However, it says that 91 AKI / 95 RON is recommended for the engine. Why wouldn't they say that 91 octane is the MIN requirement, rather than recommended ? So I got confused and started this thread.
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  #32  
Old 02-19-2014, 03:15 AM
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Re: Octane rating for the SRT ?

Either 95 or 98 will be fine. Mixing it won't matter either. If like Mattando says that you feel a performance drop between the two then pick the one you like. Neither will hurt your engine and mixing and matching will not either. Your dealer is full of sh!t.

For the price you get 98 for I would be using that all the time every time but if for some reason you can't get it at a particular time ( eg; station out of 98 ) then put in 95. Swap back once the 98 is back in stock.
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Old 02-19-2014, 03:41 AM
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We'll said cage. I'm a mechanic by trade and I've encountered this many times and I sorta had a rough idea that it would happen but what do ya do when the cars on empty at 10pm and your pregnant wife could give birth at any moment? Probably not the best time to be running around looking for 98 haha.
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Old 02-19-2014, 03:47 AM
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Re: Octane rating for the SRT ?

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Originally Posted by Cage View Post
Either 95 or 98 will be fine. Mixing it won't matter either. If like Mattando says that you feel a performance drop between the two then pick the one you like. Neither will hurt your engine and mixing and matching will not either. Your dealer is full of sh!t.

For the price you get 98 for I would be using that all the time every time but if for some reason you can't get it at a particular time ( eg; station out of 98 ) then put in 95. Swap back once the 98 is back in stock.
Hmm I see, thanks for the input. And just to confirm, I can add 98 on 95 even if I had half a tank full of 95, right ?
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Old 02-19-2014, 04:29 AM
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Re: Octane rating for the SRT ?

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Originally Posted by DarkHue View Post
Hmm I see, thanks for the input. And just to confirm, I can add 98 on 95 even if I had half a tank full of 95, right ?
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  #36  
Old 02-19-2014, 04:30 AM
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Re: Octane rating for the SRT ?

Hahahahahaha
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