- I just bought a brand new 2021 challenger with a 5.7 hemi and 8 speed auto. The recommended gas is either plus or premium. Some guys at the dealer said I could use regular and just put a bottle of fuel cleaner in every few fill ups. Is that OK to do or should I stick with buying plus and if regular is fine than what brand and kind of additive should I use
You bought a V8 muscle car. Why would you feed it the cheap junk? Muscle cars are about maximum performance and power, neither of which you'll get on regular.
When I had my 2019 Charger R/T, I used Shell mid grade and it worked great. Hemi motors do not like regular, and you will lose MPG, horsepower, and likely hear pinging at wide open throttle.
Use what the people who built the car suggest, not Bubba the oil changer. As for brand, as long as you use top tier fuels you'll be fine.
Whatever happened to that Charger? Another horror story? Or did you lease it or something?
Nah no horror story there. I actually miss it every day. But I went with the Honda because I drive a ton and I know the Charger would have killed me on fuel. Plus the higher mileage reliability is, at best, mediocre. So far, the Accord is doing well for me. 15k miles in and it hasn't been back to the dealer.
@Jdr1989 Yeah. DON'T.
If you want exhaust, get a quality cat back. Straight pipes:
1. Sound like CRAP and are just noise with NO TONE
2. Mess with your back pressure and are bad for your engine
3. Are annoying as heck to everyone around you
4. Will vibrate your interior apart from the vibrations and drone
From cheap gas, to Home Depot special exhaust for your BRAND NEW $35k car, this thread is giving me heartburn. {black}:sad:
Those HEMIS hate anything less than 87 or better. My dad ran 85 in his 17 rebel and it performs way better now after I told him to use a higher grade.
In the U.S. 87 octane IS regular. Mid-grade is 89 and premium is 92 or 93. (I have to use premium in my '67 Rebel or it pings like crazy.)
Not everywhere in the US , in my home state 85 IS regular while 87 IS mid grade. @chucktobias
Wow, had no idea, most cars I've seen in the last few decades specify at least 87 octane. 85 octane would be for lawn mowers.
@chucktobias yeah you’d think but I know of 2 states that use 85 for regular.
Stick with brand of Top-tier fuel, and fill up with Mid-grade or Premium, your choice. I would only put regular in my SS Camaro if I was down to fumes and regular is the only thing available. Even then I'd put in enough to get to another station and fill the rest with premium.
I've only bought plus so far just incase. What do you think about Murphy fuels. I know they aint top tier but they have a guarantee on there fuel. And there 20 to 30 cents cheaper than anyone here
they're ok. about the same as everyone else here in NC. the one that's close to us here; I was always getting hit up by people saying "could you spare a few buck so I can get some gas to make it to XXX." so I stopped going there, tired of these peeps trying to scam some $$ from me.
Use what is recommended by the maker. Engines are built for certain octane levels. You have a high performance engine, and you don’t want the gas to combust prematurely. Lower octanes may combust prematurely. Higher octanes are less prone to premature combustion.
If plus or premium is required, get plus or premium.
If plus or premium is recommended, get plus or premium if you want maximum efficiency and performance.
nah that cars tuned for premium man... put top tier in it too not cheap stuff
https://www.toptiergas.com/licensed-brands/
I seen that website but there's some stations that should be on that list that aren't. I downloaded the GasBuddy app and you can filter all the mid and premium prices and stations and save a good bit on fuel.
Anybody got advice on straight piping an rt