Interesting Drive article E10 vs 91RON vs 95 RON

[ebxr8240]

On the cars we have the Focus doesn't like it .. Its an 1800 04 model.. I assume it runs close to Stoich ?? Which will run lean ..It's burnt the cat out twice, every time E10 is used..$1500 a pop through Ford..
An EDXR6 with re built engine with ACL race pistons has VERY high compression and typical of these engines tune runs rich.. With 91 we have to retard timing to 6 to 8* to prevent ping..
BUT with E10 and ignition timing set at 10* it loves the stuff..
My car V8 turbo 5.4 Windsor was tuned on a mix of E10 and 95 when it dyno 482 rwkw..
AFR was 11.2 ..Then we re filled tank with straight 95. Back to dyno and tuner had to drop ignition timing back 4* to 24* but we could lean out AFR to 11.7 without loosing power or detonation at 16 Lb boost..
The 94 WRX doesn't seem to mind E10 but I tend to mix the fuel as its a Jap spec with higher compression engine, they have 100 octane in Japan..
The 07 WRX doesn't seem to matter, maybe modern engine management etc is more suited to alcohol type fuel..
The Turbo ED with AU engine running std compression runs ok on E10. But it has bigger injectors, wide band 02 sensor etc it just uses more fuel..
Or more the point forced induction runs very well on E10.. It requires load, ignition timing as its slow burning, richer mixture and compression or boost...
It seems the turbo management systems are more tunable to run a wider tune envelope...
Older cars have rubber type hoses that don't hold up too well.. Mind you given the age?? In some cases these should be replaced anyway.. In carb engines if there's any water in fuel bowl ?? It will fairly quickly corrode car being made from alloy..
Ah keep the money here imo and have some COMPETITION to the oil barons..