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| # | Post Title | Result Info | Date | User | Forum |
| Answer to: revving engine after switching from ethanol gas to ethanol-free gas | 25Relevance | 3 years ago | Justin Shepherd | Submit Your Question HERE | |
| ... to gum up if you don't use it regularly. You also destroy rubber parts if they're not designed for ethanol. The gasoline hardens and embrittles rubber if it wasn't intended for 10% ethanol gas. This is not so for fuel injected engines. Simply using it regularly will keep parts from getting gummed up. Straight gasoline also has a lower octane rating than "gasohol", which means more of a tendency to prematurely detonate as opposed to a controlled ignition. Aviation gasoline is also not just straight gasoline, it's still blended with tetraethyl lead, for ... | |||||
| Answer to: Do all turbos require premium fuel | 25Relevance | 5 years ago | Dad2LM2 | Submit Your Question HERE | |
| ... the fuel (this is how a diesel engine works without spark plugs). Turbos and superchargers pre-compress the air before it enters the cylinder in order to increase the oxygen available for combustion. The problem with using low-octane fuel in older turbo cars is that at the higher pressure, you can get spontaneous ignition before the cylinder reaches the high point of the compression stroke (ie, pre-ignition), which causes knocking and can eventually damage the engine. You can overcome this by using higher octane fuel, which is less prone to pre-ignition. ... | |||||
| Answer to: Supercharged Pontiac GT? & How necessary is premium fuel. | 23Relevance | 5 years ago | Mod_Man | Submit Your Question HERE | |
| If it is a GT and not a GTP, someone added the supercharger to the vehicle. In that case, they likely tuned the car to run premium only. With aftermarket forced induction, premium fuel is an absolute MUST. If it is tuned for premium and you run Regular, you will damage the engine. | |||||
| Answer to: Gas type | 23Relevance | 6 years ago | Whatchamacallit | Submit Your Question HERE | |
| This has been discussed before: | |||||
| 2019 Lexus GX460 - Premium or Regular gas? | 25Relevance | 3 years ago | 0226LexGX460 | Submit Your Question HERE | |
| Hi Scotty! I just purchased a 2019 Lexus GX460 with 52,249 miles on it, and I love it. I have fallen down the rabbit hole regarding whether or not I have to use premium gas. After countless forums, articles, and YouTube videos I’ve come to you for (hopefully) a definitive answer, as I’ve found a lot of info on both sides of this discussion. I am not auto-mechanically inclined so don’t know enough to form a good basis for judgement. I’m happy to put premium in this vehicle if necessary as I’d like to keep it a long, long time and have it continue to run ... | |||||
| Answer to: Does my wife's Lexus really require premium gasoline? | 25Relevance | 4 years ago | Dan | Submit Your Question HERE | |
| ... that has a high anti known index, aka premium fuel. Running such a car on regular will probably be fine as most ECUs are able to get the ignition timing retarded enough to allow for poor quality fuel. BUT in case where the engine is unable to retard the ignition enough or reduce turbo performance - your fuel will detonate and your brand new high performance engine may be toast. Do you really want to risk damaging your engine and VOIDING your warranty over what type of fuel you put in a brand new Lexus?? It’s not worth it - just use premium. | |||||
| 2000 Jaguar SType 3.0 starts, then dies | 23Relevance | 5 years ago | SicilyNY | Submit Your Question HERE | |
| 😱My 2000 S Type Jaguar, 3.0 115k mi..recently bought..no service records..looks great inside hood. 8 months all great..filled up with Walmart premium gas..nobody had premium..drove home. 3 days later, got 4 blocks car cut off. Starts then dies...towed home. Now what .water in gas? Debris in gas? fuel filter/fuel pump? No engine light on. Battery lights up everything. Fuel pressure check? Very limited $$ retired nurse/ recently disabled. I need gas tested( can't syphon due to insane gas tank geography) so they need to open fuel line to test gas. Can ... | |||||
| Answer to: 91 Premium Fuel for 91' Toyota Pickup 2.4L (Extended Cab/RWD) | 23Relevance | 5 years ago | Justin Shepherd | Submit Your Question HERE | |
| You're throwing your money out the window using the premium gas if the engine isn't made for it, at least if you're doing it all the time. Run a Top Tier fuel, Shell Regular gas is just fine, but any Top Tier retailer will do. That's my go-to in my '99 Ranger and my '79 Catalina. If you get knocking on regular from carbon build-up, that would be the only real reason to run it constantly. I only run high test gas in my 2017 Mustang (Shell V-Power, typically) but that's because I had it professionally tuned to run on premium only. Every once in a while I r ... | |||||
| Answer to: Putting regular gas instead of premium | 23Relevance | 5 years ago | JustASneakyDude | Submit Your Question HERE | |
| Regular gas, super and premium have different octane level. (87 regular, 89 super, 91 or 93 for premium). Roughly speaking, the higher the octane in the fuel, the more compression it needs in order to burn. The problem is if your engine works on 91 and you use 87, there is a chance of detonation, where the fuel could pre-ignite by compression alone (no spark), therefore burning before the piston reached it's normal spot. An off-rythm combustion like this puts a lot of stress on the engine parts and obviously is far from ideal. I would recommend staying with ... | |||||
| Gas type change | 23Relevance | 6 years ago | Dzirlo | Submit Your Question HERE | |
| Just bought a 2007 Mercedes SLK 280. The manufacturer requires premium gasoline, however, the private seller states they never used used premium, only regular. That's 13 years of regular gas with no problems. If I put premium gas in the car now, after all those years of regular, will it ruin the engine? Will it make a difference at this point with HP? Thank you. | |||||
| Do all turbos require premium fuel | 21Relevance | 5 years ago | leaflard | Submit Your Question HERE | |
| Hey Scotty, I just bought a 2021 Kia Seltos sx turbo with 11000 miles on it and have been wondering about what fuel to put in. When I did my research online and looked at the manual it recommend regular 87 octane fuel. But growing up my parents always warned me that turbos require, "the expensive gas",premium fuel. So who's lying to me. My parents or the dealer? Can I really put regular non premium gas in a turbo engine? | |||||
| Answer to: Midgrade with Octane boost vs Premium | 21Relevance | 5 years ago | yaser | Submit Your Question HERE | |
| If it is required, you need to use premium gas. Is there any reason you want to add booster to the lower octane gas and use it instead of premium? | |||||
| Should I use premium gas? | 21Relevance | 3 years ago | Sanders79 | Submit Your Question HERE | |
| Just got a great deal on a 2010 rx 350 with a clean history. Can't believe how smooth and comfortable the ride is. I assumed it ran on 87 but have come to realize that premium is suggested. Been running regular for over a month with no noticeable impact to power or fuel economy. Should I immediately switch to premium or is there anything I should be looking out for running regular? Thanks! Car has 130K mileage. | |||||
| Supercharged Pontiac GT? & How necessary is premium fuel. | 23Relevance | 5 years ago | ichyilla | Submit Your Question HERE | |
| ... in all of my hours of research I had seen the GTP to be the trim with the supercharged engine. The engine certainly is supercharged, anyone know what that could be? He also recommended I use premium fuel. I have a good job but I'm about to be a full time student and premium fuel would hurt my pockets a lot more. How necessary is it for my car to receive premium? | |||||
| 91 Octane required on my 2022 Tucson? | 22Relevance | 5 years ago | Frog | Submit Your Question HERE | |
| Hi Scotty, I just bought a 2022 Hyundai Tucson SEL with 2.5L 2497CC l4 gas DOHC Naturally Aspirated engine. Hyundai dealers are advertising this vehicle as using regular gasoline. Nowhere is there a sticker or indication on the car to use premium. The only place is in the manual which I read AFTER I purchased it, and this statement in the manual goes beyond the more typical "premium gasoline is recommended", as it implies premium gasoline 91 or higher is REQUIRED. I called the dealer who told me premium was recommended only, not required, and they filled ... | |||||