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🤔How many chr drivers are using premium fuel.The filler sticker says premium only but the owners book says 95 octane,and up to 10 percent ethanol,so e10 should be fine...big saving to be had.

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Would need to check the octane rating for the E10. My understanding is it is the required 95 with some brands but unfortunately below that mark in others. The trick is to find a brand where the E10 is definitely 95. Manual does say you can use 91 in an emergency so I presume the (very) occasional tank "might" be OK.

Bottom line, how desperate are you to take the risk? Lower octane increases the risk of "pinging" (pre-detonation) which can be very damaging to engines. Think of it this way.... If you had to fully fill the 50L tank and assuming a price difference of about 14cpL between E10 and 95, it's only about an extra $7 per refill (how often are you putting in 50 litres in one fill?). The car is quite economical so you don't live at the servo therefore I'd call the $7 an investment against costly repairs. You can bet that if you had a major engine incident, Toyota would be testing the fuel being used before agreeing to a warranty repair. Maybe I'm a little paranoid but my experience is the manufacturer will look for any out. Your "big savings to be had" might not be looking so great then IMHO. 

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On 3/7/2019 at 1:39 PM, John 1948 said:

🤔How many chr drivers are using premium fuel.The filler sticker says premium only but the owners book says 95 octane,and up to 10 percent ethanol,so e10 should be fine...big saving to be had.

I use 98... I never use anything less.

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