What Octane Fuel are you using?

[solidbrix]

91 or higher.

FYI I had a chance to talk to 3 Toyota Engineers late last year at Overland Expo East. When I asked the question, they all looked at each other, rolled their eyes and said "OH, this question". They gave me a really long technical explantation but summed it up that because the Land Cruiser was designed in Japan, & designed to be a worldwide product, that premium fuel is the standard.

Anyone who's been abroad, will know this is true, our "premium" gas in the states for just regular in places like Europe.

Finally, when I expressed the "4Runner has same engine runs on different regular 87 octane level" debate, one engineer specifically said "If you're in the middle of nowhere and the only gas you can find is watered down crap, they designed the LC to make sure you get home, even on that".

I personally took the context as: Use Premium, only use regular or worse if you have too.

 

[RideWithYanu]

Finally, when I expressed the "4Runner has same engine runs on different regular 87 octane level" debate, one engineer specifically said "If you're in the middle of nowhere and the only gas you can find is watered down crap, they designed the LC to make sure you get home, even on that".

I just stick Premium personally, and hate this debate, but this part doesn’t actually make sense. That doesn’t answer why premium is suggested in the Land Cruisers but not the 4Runner with the same engine. Those Toyota engineers seem like turds.

 

[TakaraLC]

That's true, but it's just the simplistic way of describing that the engine control systems will adjust for octane variations.

It is a better explanation than the blanket claim you made about ECU preventing knock by adjusting timing.

Few ways that ECU can prevent pre-spark detonation are opening valves during compression to decrease pressure, or injecting fuel very late into compression cycle. Both of these methods will gradually damage the parts involved. Venting unburned fuel to exhaust will damage catalyst, and late injection of fuel will cause carbon buildup and injector baking.

 

[cvx5832LC]

My data so far on this long term experiment

Toyota Land Cruiser (Toyota Land Cruiser) | Fuelly

 

[BreezTrd]

I put premium 91-93

 

[NoMe cruiser]

Much talk about non ethanol fuel and it’s nice to have for seasonal equipment like snowmobiles, lawnmower etc… things that get stored for several months because the non ethanol won’t chemically separate like e10 does. I’ll say this about e10 though, I haven’t had a gas line freeze since the mandate.