Does anyone buy medium grade gasoline?

[fuzzybabybunny]

I just realized this while filling up. I've heard of regular cars that only need regular unleaded, and high performance cars that require premium. So what kind of cars require at least medium grade? I don't seem to hear about them.

 

[punjabiplaya]

93 only for me. I don't know what that shit is there, although I'm sure there's some logical/rational reason.

 

[thescreensavers]

I know right, I have always thought of this. Like who the fuck uses 89. I guess people at higher altitudes? IDK

I always use premium

 

[PhoKingGuy]

Costco doesn't even carry the middle one, they don't carry diesel too sadly 🙁

Sam's does, but doesn't make it worth it to me.

 

[The Boston Dangler]

you can thank 89 octane for driving up the prices of 87 and 93. it places increased demands on the 87 stock and 93 additives.

 

[vshah]

i recall seeing some car somewhere that required 89.

93 for me though

 

[woodie1]

you can thank 89 octane for driving up the prices of 87 and 93. it places increased demands on the 87 stock and 93 additives.

lol...priceless...

 

[WhoBeDaPlaya]

Sure, lots of people do since it's priced lower per gallon (at least in the midwest) since it's we only have the ethanol-blended crap or straight 87.

 

[bruceb]

My car is happy with 87 octane. But on my brothers truck he prefers to run 89 octane.

 

[LTC8K6]

89 is the preferred fuel for my 5.7L hemi, 87 is okay to use, according to the manual.

 

[JCH13]

A number of high(ish) compression NA engines use it, a Volvo 5cyl for example, and I *think* some low-boost turbo engines.

 

[Vetterin]

I used to put it in my 85 vette when it was around $2.00 gal but for the last 10 years or so it's been strictly 87 for me.

 

[Gillbot]

ahhh, another one of these threads/debates beginning........

 

[ViviTheMage]

toptiergas.com

 

[JeffreyLebowski]

I'd like to know what the people that say they use 93 are actually driving.

 

[JeffreyLebowski]

ahhh, another one of these threads/debates beginning........

Duh, well obviously, it's more expensive therefore it MUST be better for my engine.

 

[LTC8K6]

5.7L Engines (If Equipped)
The 5.7L engine is designed to meet all
emissions regulations and provide satisfactory
fuel economy and performance when
using high quality unleaded gasoline having
an octane range of 87 to 89. The manufacturer
recommends the use of 89 octane
for optimum performance. The use of premium gasoline
is not recommended. Under normal conditions, the use of
premium gasoline will not provide a benefit over high
quality regular and mid-grade gasolines, and in some
circumstances may result in poorer performance.
Light spark knock at low engine speeds is not harmful to
your engine. However, continued heavy spark knock at
high speeds can cause damage and immediate service is
required.

 

[Vette73]

I'd like to know what the people that say they use 93 are actually driving.

Corvette (350hp LS1) gets 93

All others (CTS and Mazda Ranger4.0) get the cheapest Reg. (87) I can find.

 

[Gillbot]

I'd like to know what the people that say they use 93 are actually driving.

Duh, well obviously, it's more expensive therefore it MUST be better for my engine.

My camaro only sees premium or race gas on certain days. 😎

 

[alphatarget1]

I was mixing midgrade with premium ((93+89)/2 = 91, minimum required) on my turboed subaru when I was broke. I don't do it anymore though.

 

[thescreensavers]

I'd like to know what the people that say they use 93 are actually driving.

Check my sig, I also advanced timing by 2°

 

[cheezmunky]

I'd like to know what the people that say they use 93 are actually driving.

Both of my turbo Subarus were 91 minimum, 93 preferred. too bad we never had 93 around here...

 

[LTC8K6]

Corvette (350hp LS1) gets 93

All others (CTS and Mazda Ranger4.0) get the cheapest Reg. (87) I can find.

Isn't 91 recommended for your CTS?

 

[TankGuys]

My 300C uses midgrade.

 

[franksta]

My weed whacker specs 89 octane. Echo SRM-225
User's manual, page 14 of the PDF