993 C2 Roadtrip to Northern Scotland - Octane booster
Discussion
I’m heading back up to my family home in Northern Scotland where there isn’t any 99 or 97 RON fuel within a reasonable distance (about 100 miles!). I plan not to fuel up with 95 and do that leg of the trip on one tank, or at worst top up a tank of 99 (so I’m running 97!?).
If I did have to fill up from empty with 95, does anyone have any octane booster recommendations for a 1994 993 c2?
Thanks in advance.
If I did have to fill up from empty with 95, does anyone have any octane booster recommendations for a 1994 993 c2?
Thanks in advance.
browngt3 said:
You have a 350 mile range on a tank of fuel so if you plan it well you should be fine. Even if you have to top up with 95 it's not going to cause an issue. Not like putting diesel in the tank 
Yes I’m sure it’ll be fine, at worst it’ll be a blend of 99 and 95. I just like to have a plan for these things..Personally I thought it was a perfectly reasonable question and I was interested in the answer. Fuel stations closing all over the place is a nuisance in rural areas and increasingly one finds those with only 95. If it does not bother one to use the wrong fuel that fine , but perhaps someone who does have a real experience based answer might helpfully post.
( The" first world problem" really has become the ultimate first world cliché )
( The" first world problem" really has become the ultimate first world cliché )
I think (!) the 993's ECU is capable of adapting the timing, even for ROZ 91 normal unleaded fuel.
You'd loose a few ponies - mostly at the top end - but it will not harm your engine.
I do carry a can of Liqui Moly Ocatne Booster in my '67 Volvo 1800 S, as it's engine is tuned to run on ROZ 98 or higher (compresion and timing) and I couldn't be arsed (or indeed be capable only in theory) to adapt the timing filling up with only ROZ 95.
You'd loose a few ponies - mostly at the top end - but it will not harm your engine.
I do carry a can of Liqui Moly Ocatne Booster in my '67 Volvo 1800 S, as it's engine is tuned to run on ROZ 98 or higher (compresion and timing) and I couldn't be arsed (or indeed be capable only in theory) to adapt the timing filling up with only ROZ 95.
The 993 engine is optimised to run on 98RON. The anti knock system and ECU is designed to adapt to run on 95RON as required so 95RON petrol will be fine. If the car comes with option 240 "Version for countries with inferior fuel" then it will also run on lower grade fuel.
If you are using 95RON petrol make sure it is not E10 ethanol fuel as all 911 before the 996 can only tolerate a max of 5% ethanol according to the advice from Porsche.
If you are using 95RON petrol make sure it is not E10 ethanol fuel as all 911 before the 996 can only tolerate a max of 5% ethanol according to the advice from Porsche.
Edited by C4ME on Tuesday 6th August 11:00
PM3 said:
Personally I thought it was a perfectly reasonable question and I was interested in the answer. Fuel stations closing all over the place is a nuisance in rural areas and increasingly one finds those with only 95. If it does not bother one to use the wrong fuel that fine , but perhaps someone who does have a real experience based answer might helpfully post.
( The" first world problem" really has become the ultimate first world cliché )
My sensible (ish) real-world suggestion then would be to fill up a few Jerry cans with one's petroleum of choice and carry them in case of shortage. ;-)( The" first world problem" really has become the ultimate first world cliché )
In 11 years of ownership I've once filled up with 95 through necessity, many years ago, and I don't recall any issues. As has been mentioned the car adjusts for it, it'll be fine. I wouldn't run it on it all the time but fuel's so regulated in this country it shouldn't be an issue.
E10, now that's a whole other story.....
E10, now that's a whole other story.....
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