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Dairyxox: Another thing to consider is the availability of 95 octane fuel.
I have a car which is supposed to run on 95 but it is impossible to purchase in my area (I live in Tauranga). Most service stations here sell 91 & 98. So you pay a premium to keep your 95 car healthy.
Lazy is such an ugly word, I prefer to call it selective participation
jonherries: 95 RON tuned car with 95 ~ maximum efficiency
95 RON tuned car with 91 ~ less efficiency, increased engine wear and less power, not worth it
91 RON tuned car with 95 ~ a little bit more efficiency/power maybe, not worth it
91 RON tuned car with 91 ~ maximum efficiency
shrub: I use 95 in every car I've owned i never put watered down crap in the tank.
Twitter: ajobbins
ajobbins:
*sigh*. Octane rating isn't a measure of how 'watered down' a fuel is, it's a measure of it's knock resistance. 95 fuel is actually in fact more 'watered down' than 91 (if only very very marginally),by the addition of anti-knock components to the fuel.
If you use a higher octane fuel than your car is designed for, you are simply wasting you money. There is no more 'energy' contained in a higher octane fuel and therefore there can be no benefit.
Gordy
My first ever AM radio network connection was with a 1MHz AM crystal(OA91) radio receiver.
Lazy is such an ugly word, I prefer to call it selective participation
scuwp: I have an as new, low Km, 2012, top-of-the-range Toyota Yaris YRS for sale..that runs nicely on 91 octane :-)
ajobbins:jonherries: 95 RON tuned car with 95 ~ maximum efficiency
95 RON tuned car with 91 ~ less efficiency, increased engine wear and less power, not worth it
91 RON tuned car with 95 ~ a little bit more efficiency/power maybe, not worth it
91 RON tuned car with 91 ~ maximum efficiency
Correct, apart from the 3rd one.
91 RON tuned car with 95 ~ No benefit, just less money in your bank account.shrub: I use 95 in every car I've owned i never put watered down crap in the tank.
*sigh*. Octane rating isn't a measure of how 'watered down' a fuel is, it's a measure of it's knock resistance. 95 fuel is actually in fact more 'watered down' than 91 (if only very very marginally),by the addition of anti-knock components to the fuel.
If you use a higher octane fuel than your car is designed for, you are simply wasting you money. There is no more 'energy' contained in a higher octane fuel and therefore there can be no benefit.
OTOH, If you use a fuel of lower octane than your car was designed for, the car will knock (fuel will ignite too soon), and your ECU will adjust the timing to stop the knock, at a cost of efficiency. Doing this long term can lead to carbon build up in the cylinders etc.
Please note all comments are from my own brain and don't necessarily represent the position or opinions of my employer, previous employers, colleagues, friends or pets.
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