Gas - Honda CRZ Forum: Honda CR-Z Hybrid Car Forums

twohondas · 10-31-2010, 10:55 AM

Since the car gets great gas mileage I thought useing a higher grade gas would be better. What grade gas do you guys/girls use.

wicked1 · 10-31-2010, 11:32 AM

lowest grade.. Try searching. it's been discussed a lot. A few are testing higher grades now, but I know at least one vocal person here doesn't see any reason to use anything other than the lowest.

VTEC Mini · 10-31-2010, 11:46 AM

All the higher grades means is a higher Octane to prevent detonation of the fuel for your higher compression engines. Since the CR-Z engine is not considered high compression it doesn't need it, so it is a waste of money.

Shatner · 10-31-2010, 12:56 PM

Run what the manufaturer states. Using higher octane won't give you more power. The higher the octane, the slower it burns. Using high octane pump will actually make your engine dirtier, valves specifically.

twohondas · 10-31-2010, 01:35 PM

Manual states using 87 Octane, most gas stations in our area carry 86 Octane (Reg) or 91 Octane (Premium), most don't have the 88 because they made room for Diesel.

Which is better to go with, the slightly lower octane (86) or the higher (91)?

CK UK · 10-31-2010, 03:08 PM

In the UK, the std stuff is 95 RON (octane), the higher stuff like Shell Optimax & Tesco's 'Super' is 100 RON.
So - over here we are using higher octane levels than you guys to start with... and just DONT get me started again on the prices per litre or the std unleaded (currently 1.19.9

)

91CRXTC · 10-31-2010, 04:16 PM

when i read my manual it said 87oct or better, also stating that better octane would result in a cleaner engine down the line.

By the way i use 89

gomarlins3 · 10-31-2010, 04:16 PM

Regular. Anything more is a waste of money.

DaveyG · 10-31-2010, 04:52 PM

Quote:

Originally Posted by gomarlins3

Regular. Anything more is a waste of money.

Exactly...lock thread please

TCroly · 10-31-2010, 08:42 PM

Quote:

Originally Posted by CK UK

In the UK, the std stuff is 95 RON (octane), the higher stuff like Shell Optimax & Tesco's 'Super' is 100 RON.
So - over here we are using higher octane levels than you guys to start with... and just DONT get me started again on the prices per litre or the std unleaded (currently 1.19.9

)

This is not exactly the whole truth. In Europe, the stated octane is RON in the US the stated octane on the pump is an average of RON (Research Octane Rating) and MON (Motor Octane Number). The MON is usually 8 to 10 points lower than RON, so the average comes out 4 to 5 points lower. Therefore the 95 RON octane in Europe is equivalent to 90 octane in the US. Now this is still more than typical 87 regular grade in the US.

10-31-2010, 12:56 PM	#4 (permalink)
Shatner Super Duper Member Join Date: Sep 2010 Location: Houston, Tx Posts: 1,285	Run what the manufaturer states. Using higher octane won't give you more power. The higher the octane, the slower it burns. Using high octane pump will actually make your engine dirtier, valves specifically. __________________ My facebook: http://www.facebook.com/profile.php?id=100000400346832 My FB glassblowing page: http://www.facebook.com/pages/Shatne...3510224?ref=ts Check it out, see my work and 'like' my page. I make all sortsa' stuff.

10-31-2010, 04:16 PM	#8 (permalink)
gomarlins3 Super Duper Member Join Date: Sep 2010 Location: Kuna Idaho Posts: 2,077	Regular. Anything more is a waste of money. __________________ Happiness is a nice road, great weather, and driving the S with Sue in the seat next to me.

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10-31-2010, 11:32 AM	#2 (permalink)
wicked1 Elite Member Join Date: Sep 2010 Location: Midwest US Posts: 877	lowest grade.. Try searching. it's been discussed a lot. A few are testing higher grades now, but I know at least one vocal person here doesn't see any reason to use anything other than the lowest.

10-31-2010, 11:46 AM	#3 (permalink)
VTEC Mini Join Date: May 2010 Posts: 3,108	All the higher grades means is a higher Octane to prevent detonation of the fuel for your higher compression engines. Since the CR-Z engine is not considered high compression it doesn't need it, so it is a waste of money.

10-31-2010, 04:16 PM	#7 (permalink)
91CRXTC Super Duper Member Join Date: Jun 2010 Location: Suffolk Long Island NY Posts: 1,639	when i read my manual it said 87oct or better, also stating that better octane would result in a cleaner engine down the line. By the way i use 89