Regular or Premium Gasoline Required?
The following users liked this post:
Oldloanman (11-25-19)
#152
Premium Gas vs Regular
Hello everyone, I just joined RX 350 family with the delivery of 2022 RX 350 since my last car is aging (14 years). I've always put premium gas as i'm used to it for 14 years and now with the new RX 350, it uses regular gas. It is ok to keep continuing to fill it up with premium gas (Costco) or theres no benefit to it. Thanks
#153
Your 2GR-FKS engine has VVT-iW on the intake valves to allow it to lower the compression ratio at low rpm and load conditions, such that it will not knock while running on 87 octane fuel. But the hp and torque ratings for your engine were obtained by Lexus using 91 octane fuel. From those two facts, you can deduce how to get optimal performance from your car. BTW, in addition to the Costco premium, my RX is very happy on Shell 89 octane. Just be sure to choose a Top Tier qualified fuel.
#154
Hello everyone, I just joined RX 350 family with the delivery of 2022 RX 350 since my last car is aging (14 years). I've always put premium gas as i'm used to it for 14 years and now with the new RX 350, it uses regular gas. It is ok to keep continuing to fill it up with premium gas (Costco) or theres no benefit to it. Thanks
#155
Hello everyone, I just joined RX 350 family with the delivery of 2022 RX 350 since my last car is aging (14 years). I've always put premium gas as i'm used to it for 14 years and now with the new RX 350, it uses regular gas. It is ok to keep continuing to fill it up with premium gas (Costco) or theres no benefit to it. Thanks
The following 3 users liked this post by redhot47fl:
#157
Always good to search first!
#158
I currently have my seventh vehicle that required premium gasoline of which I have used regular. Tried many occassions on each with premium and noticed absolutely no difference. I remember a thread awhile back here on this issue and a member swore his vehicle drove better and even said the transmission shifted smoother. Each vehicle drove over 100,000 miles before trading in or selling. Had ZERO engine issues. Experimenting with the other two levels, I have noticed zero difference in gas mileage or performance. I have used 87 in cars that have required premium for over a million miles and have not had one problem.
I always revert back to two MIT graduates that are car mechanics who had a syndicated radio show called Car Talk for 35 years.
http://www.cartalk.com/content/premi...egular-0#myth4
From the USA Today:
The only modern engines that should really need premium are those with superchargers, which force-feed fuel into the cylinders. "You're driving along and just tramp the gas and the knock sensor cannot sense the knock fast enough in some cases," because the supercharger boosts pressure so fast, says Bob Furey, chemist and fuels specialist at General Motors.
Burning regular when the owner's manual specifies premium won't void the warranty, nor damage the engine, even the most finicky automakers say. "You're giving up perhaps just a little bit of performance that a customer wouldn't really even notice, it's so slight," says Furey.I have researshed on the net and can not find one article that confirms the need to use premium except in a high charged turbo engine. So before the pissing contest starts please please if you want to use premium please do.
Good article and You Tube clip on gasoline grades.
https://www.consumerreports.org/car-...h-extra-price/
I always revert back to two MIT graduates that are car mechanics who had a syndicated radio show called Car Talk for 35 years.
http://www.cartalk.com/content/premi...egular-0#myth4
From the USA Today:
The only modern engines that should really need premium are those with superchargers, which force-feed fuel into the cylinders. "You're driving along and just tramp the gas and the knock sensor cannot sense the knock fast enough in some cases," because the supercharger boosts pressure so fast, says Bob Furey, chemist and fuels specialist at General Motors.
Burning regular when the owner's manual specifies premium won't void the warranty, nor damage the engine, even the most finicky automakers say. "You're giving up perhaps just a little bit of performance that a customer wouldn't really even notice, it's so slight," says Furey.I have researshed on the net and can not find one article that confirms the need to use premium except in a high charged turbo engine. So before the pissing contest starts please please if you want to use premium please do.
Good article and You Tube clip on gasoline grades.
https://www.consumerreports.org/car-...h-extra-price/
#161
It gives a WARNING not to go below 87 octane. All tests on the RX360 were done using 91 octane, a search in the thread will provide the info.
There are some benefits in using premium gas besides the obvious there are also the detergents to keep valves. EGR valve & piston head freer from carbon deposits, a benefit if you keep you car
for a long term or high mileage. In the end it's up to the individual and how well the machine performs.
#162
My point that experets say you don't need premium even if it states premium one could easily assume if it states regular than you also don't need premium. Watch the Youtube clip.
Last edited by Freds430; 12-11-21 at 02:00 PM.
#163
The owners manual doesn't say to use regular !
It gives a WARNING not to go below 87 octane. All tests on the RX360 were done using 91 octane, a search in the thread will provide the info.
There are some benefits in using premium gas besides the obvious there are also the detergents to keep valves. EGR valve & piston head freer from carbon deposits, a benefit if you keep you car
for a long term or high mileage. In the end it's up to the individual and how well the machine performs.
It gives a WARNING not to go below 87 octane. All tests on the RX360 were done using 91 octane, a search in the thread will provide the info.
There are some benefits in using premium gas besides the obvious there are also the detergents to keep valves. EGR valve & piston head freer from carbon deposits, a benefit if you keep you car
for a long term or high mileage. In the end it's up to the individual and how well the machine performs.
#164
My 2022 RX owners manual says 87. I wonder if your owners manual has a different number? It would interesting if you post your page so we can see that the Lexus is changing it year after year or model after model? I am going by my owners manual.. Also wanted to add my gas tank door says the same thing..
The following users liked this post:
happychris (12-11-21)