Premium Gas !

[Franklin]

Have used regular gas ️ on Lexus GX ( V- 8) & several Bi Turbo Mercedes Benz with no engine issues ( over 19 ) years & meticulous service records ! It may affect gas mileage ! Anyone with similar experience?? Just curious !

 

[Bubblecub]

Yes it can affect, Lower octane gas can cause knocking in your engine.

 

[Sixgun95]

You just spent 100k ish on a new car and your concerned about saving $5 per fill up?

 

[JoeRob]

Use Premium - Just do it.

 

[Yrag57]

It’s a 3.4 liter V6, which is barely over 207 cubic inches tasked with powering a large heavy SUV. The twin turbochargers give it its kick (quite well, actually). I’m no chemist, but with the job this little engine has, it makes sense to use a fuel that is a pure enough spirit to minimize variables in combustion temperatures.
My Boxster is far lighter and isn’t turbocharged, but it likes the good stuff too. Bite the bullet on this one. You’ll thank yourself if you keep it a few years.

 

[JoeRob]

Which fuel to burn in an automotive engine, or any other gasoline engine - It is a question of "pre-ignition" or early detonation of the gasoline in a higher compression engine. I don't know what the compression of our engine is but I think because we have the turbocharged engine, compression is high which could/may lead to the potential of Pre-ignition if a low/lower octane fuel is used. Pre-ignition can tear our engines apart if allowed to happen by using a lower octane fuel. So, Lexus recommends/requires (if possible) owners to use Premium, higher octane which is less likely to have Pre-ignition.
Generally, people don't know that when a gasoline retailer buys gasoline from an area distributor, all gasoline is the same. It is the "chemicals" that are added to the gasoline that make it what it is when "we" buy it at a retail gasoline point.
I had a relative that worked for an area Exxon distributor and would go to Memphis gasoline distributor with a gasoline tanker truck. He had a "credit card" type of card that carried his "brand" of fuel additives. He pulled the truck up and placed the transfer hose in the top of the fuel cell, swiped his card in a card reader which identified "Regular Unleaded, Mid Unleaded or Premium Unleaded gasoline. He filled each cell on the trailer with X amount of gas and then off he went to deliver customers gasoline, Regular, Mid, Premium. But it all came out of the same hose with different additives to make the different grades of gasoline.
We need to be concerned about octane to use in our vehicles and from a "reputable" brand of gasoline. And it is all about Pre-Ignition of fuel to keep higher compression engines from Pre-mature combustion to prevent "knocking" in our engines and tearing them apart.
That's my 2 cents on gasoline.

 

[gvan1998]

You just spent 100k ish on a new car and your concerned about saving $5 per fill up?

Yes i did spend close to 100k on a new car. It's my car. Ill put in whatever I want.

 

[JoeRob]

I'm reminded of an old song, probably most everyone here will not remember it - "It's my party and I'll cry if I want to, cry if I want to...."


Reading the morning paper a few minutes ago and came across an article about "quality of fuel" in a local convenience store. The store was a large regional brand. A local pickup truck owner had just filled up on diesel fuel. As the owner left the store and went about his daily routine, his engine began to have issues with all the warning lights coming on and the engine finally stopped running. He had the vehicle taken to the Ford dealership where he purchased it.... the dealership examined the engine and produced a "Cause and Effect" letter to the owner of the pickup. "Damaged beyond repair" due to "water in the fuel".
1. Shop at a fuel provider you have great confidence in to ensure there is plenty of fuel running through the store tanks to minimize water gathering "in the bottom of the tank" which is the same location as the suction of the fuel pumps that deliver the fuel to the dispensing pumps.
2. If you have an issue which you can reliably tie back to a fuel provider, please file a complaint with the State Dept. of Agriculture.

I'm done for the day - hope all have a wonderful spring day!