I'm in the market for a GX470 and ran across a note mentioning the engine requiring premium. Does the GX470 really take premium fuel? Does anyone strictly run regular?
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If you go here, Lexus Drivers My Lexus Online Owner's Manual. Lexus tells you different things for different years, like 2005 premium is recommended, 2006 you can use reg, but only for a short time, 2007-09 only premium.
Lexus went to VVTi in 2005 and 2006 had a power rating upgrade because of new SAE ratings. So with VVTi, did it become a marking thing or really needed? The 4Runner V8 for 2005-2009 have the same engine with VVTi but lower HP & TQ ratings.
I have been switching between the two after 5-6 fill ups and don't see a big difference in performance or mpg.
Right. You should never feel the truck detonate as the knock sensors are doing their job. It's more common in forced induction applications, but a single, heavy detonation can blow a hole right through a piston.To me it sounds like Lexus has a different tune requiring premium. That's why it has a different HP rating then the 4Runner with the same basic engine. The stepping of power is likely the ecu pulling timing due to knock noticible to the ecu only.
To me it sounds like Lexus has a different tune requiring premium. That's why it has a different HP rating then the 4Runner with the same basic engine. The stepping of power is likely the ecu pulling timing due to knock noticible to the ecu only.
I'm in the market for a GX470 and ran across a note mentioning the engine requiring premium. Does the GX470 really take premium fuel? Does anyone strictly run regular?
To me it sounds like Lexus has a different tune requiring premium. That's why it has a different HP rating then the 4Runner with the same basic engine. The stepping of power is likely the ecu pulling timing due to knock noticible to the ecu only.
Right. You should never feel the truck detonate as the knock sensors are doing their job. It's more common in forced induction applications, but a single, heavy detonation can blow a hole right through a piston.
Mexellent, I have noticed this exact same phenomena in my 06. While accelerating with healthy throttle, the power seems to come in steps, and not a smooth, progressive arch. I chocked it up to the driving habits of the PO. I planned on pulling the battery, resetting everything to zero and going from there. The truck had a full tank of premium.