Premium fuel required on the RX350?
05-04-23, 05:43 AM
#17
My original post asks if I am not into performance, will it harm the engine to use regular gas? Several of the reply’s indicate that the computers will adjust the timing and it would be safe to use regular. Just want to do the right thing and not harm the engine. But it’s a waste of money to pay $1,00 more a gallon.
The manufacturer states that RX350 gas and RX 500h as well as NX350 gas must have premium fuel. If a customer deviates from that mandate, it is their choice...
05-04-23, 06:45 AM
#19
Pole Position
05-04-23, 07:05 AM
#20
Interestingly, maybe, is that the 350H hybrid drivetrain is the same as the Toyota Sienna, Toyota Highlander, etc. None of these require or even mention Premium in their owner's manual. I know the compression ratio of the Sienna Engine and the RX350H is identical and this is usually the "reason" for an engine to require a particular grade of fuel.
05-04-23, 08:17 AM
#21
Instructor
@ggebhardt
'"Use of unleaded gasoline with an octane rating lower than what is listed for your model year vehicle could potentially result in engine knocking. If the octane rating used is less than required, damage to the engine may occur and which could void the vehicle warranty. " [Lexus' emphasis, not mine]
https://support.lexus.com/s/article/...cle%20warranty.
I rest my case. Warranties can be voided for a lot of things. Non-OEM parts, components damaged as a result of accidents, etc.
'"Use of unleaded gasoline with an octane rating lower than what is listed for your model year vehicle could potentially result in engine knocking. If the octane rating used is less than required, damage to the engine may occur and which could void the vehicle warranty. " [Lexus' emphasis, not mine]
https://support.lexus.com/s/article/...cle%20warranty.
I rest my case. Warranties can be voided for a lot of things. Non-OEM parts, components damaged as a result of accidents, etc.
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EBone (07-02-24)
05-04-23, 08:21 AM
#22
Pole Position
@ggebhardt
'"Use of unleaded gasoline with an octane rating lower than what is listed for your model year vehicle could potentially result in engine knocking. If the octane rating used is less than required, damage to the engine may occur and which could void the vehicle warranty. " [Lexus' emphasis, not mine]
https://support.lexus.com/s/article/...cle%20warranty.
I rest my case. Warranties can be voided for a lot of things. Non-OEM parts, components damaged as a result of accidents, etc.
'"Use of unleaded gasoline with an octane rating lower than what is listed for your model year vehicle could potentially result in engine knocking. If the octane rating used is less than required, damage to the engine may occur and which could void the vehicle warranty. " [Lexus' emphasis, not mine]
https://support.lexus.com/s/article/...cle%20warranty.
I rest my case. Warranties can be voided for a lot of things. Non-OEM parts, components damaged as a result of accidents, etc.
I guess that is why the dealer filled your gas tank with regular unleaded at delivery.
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dklanecky1 (05-06-23)
05-04-23, 08:27 AM
#24
05-04-23, 08:33 AM
#25
Pole Position
05-04-23, 09:06 AM
#26
I know for a fact that at least one Lexus dealer uses Regular fuel on all new and used car deliveries. Fact, I have filled up many of them with reg as it was the only fuel available on the lot.
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WJ123 (02-11-24)
05-04-23, 09:24 AM
#27
Pole Position
My dealer admitted to me they have one underground tank at the dealership and everything get filled with regular unleaded gas.
05-04-23, 09:46 AM
#28
Pole Position
05-04-23, 04:24 PM
#30
I always fill up at 1/4 tank. If I have a 1/4 tank of premium, I top off with 3/4 regular. At next fill-up, I will top off with Premium and continue switching that way. It is hard to find mid-grade around here.
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