3 ms·
A have a 2007 European car that wants 93 according to the manual, but will "run acceptably" on 91, not sure if it's changed in recent years though.
by boldlybold 3y ago
A have a 2007 European car that wants 93 according to the manual, but will "run acceptably" on 91, not sure if it's changed in recent years though.
- mrguyorama 3y agoEU octane numbers are different from US octane numbers
- kube-system 3y agoThey are, however, manuals and documentation for US market vehicles will be specified in AKI (aka '(R+M)/2') regardless of who manufactured them. Some manuals also specify both AKI and RON, and that can be a source of confusion.
- lexszero_ 3y agoI'm in Europe and here it would be "98 recommended, 95 allowed with possible degradation in performance", as it's the case for my 2006 car. More modern small volume turbocharged engines should be even more sensitive to octane number due to higher compression ratios than common American engines of twice the volume for the same horsepower. The engine ECU will reduce boost pressure and fuel charge based on feedback from the knock sensor.
- SoftTalker 3y agoRoughly, 98 RON (Europe) = 93 (R+M)/2 (USA)
- orangepurple 3y agoOctane requirements are also a function of elevation