Optimax, Premium and Regular

Pork Chop Express · 08-02-2006, 11:53 AM

Can you mix regular unleaded with Optimax or Premium?

I was on a trip out into the country and was running low on fuel. I only put Optimax in my car (only about $4-5 difference).. As the local Shell station was about 30 years old, they only had Unleaded so I tanked up with that.

The other option was to drive 10km to Mobil to get Premium Unleaded.

Is it bad to mix all the fuels?

Can optimax, premium and regular be mixed together?

I only get 450km from a full tank (40L) of Optimax from my 1.8L BA Hatch 97.

Ripper323 · 08-02-2006, 12:09 PM

I've never heard of why you can't. they are all still unleaded fuel, just different qualities.

skippy · 08-02-2006, 04:42 PM

As I am told
not really a problem more just making your ECU work a bit harder to adjust constantly, you might not get the full mileage out of your premium petty but that is the only drawback I hear. If you use same petty consistantly you will get better performance and mileage out of it, I am trying that now, going 95 RON at Caltex as 4c off and 5% as a tafe student.

However going to old dodgy servos is not recommended as petty does go off and slimy or something, but yeah newer place with high turn over is the one you want. Ever picked up a load of petty and you car just went gutless on you, happened to me badly once driving for 30 mins odd all fine, fill up as it Tuesday arvo anyway within 2 kms car is pinging no power and yeah was crap till that load got diluted out.

IMHO

Red Frog · 08-02-2006, 11:39 PM

i usually fill up - depending on the price and how the car is running - 75% unleaded and 25% higher octane (whateva is available). i do it now and again when the car is feeling sluggish to give the injectors a little clean. i can feel the difference in how the car runs. it's much more smoother and repsonds quicker too. with that ratio i use, i couldn't see the ECU having to do much more work than normal. i filled up on the mobile premium (can't think of the name) and unleaded 2 weeks ago and felt the car made a big difference. then filled up w/ unleaded and vortex on the wkend, and the car's performance hasn't changed much at all. so who knows. but it definitely doesn't do any harm.

and vaughan, u get 5% off as a TAFE student?! no fair! do u think i could get the same as a teacher on a measly wage? lol

hahaha

bourbon · 08-02-2006, 11:50 PM

they say you should run 3 or 4 tanks of normal unleaded...then 1 tank of high octane to keep the system cleaner

08-02-2006, 11:53 AM	#1
Pork Chop Express Junior Member Join Date: Aug 2005 Location: Melbourne, VIC Car: 1997 Mazda Astina Hatch Posts: 85	Optimax, Premium and Regular Can you mix regular unleaded with Optimax or Premium? I was on a trip out into the country and was running low on fuel. I only put Optimax in my car (only about $4-5 difference).. As the local Shell station was about 30 years old, they only had Unleaded so I tanked up with that. The other option was to drive 10km to Mobil to get Premium Unleaded. Is it bad to mix all the fuels? Can optimax, premium and regular be mixed together? I only get 450km from a full tank (40L) of Optimax from my 1.8L BA Hatch 97.

08-02-2006, 12:09 PM	#2
Ripper323 Carless Bum Join Date: Aug 2005 Location: Shanty town of Darwin Car: whatever I can borrow Posts: 1,044 View Photos By: Ripper323	I've never heard of why you can't. they are all still unleaded fuel, just different qualities. __________________

08-02-2006, 11:39 PM	#4
Red Frog Senior Member Join Date: May 2004 Location: Shepherds Bush, London BABY Car: My feet :p Posts: 1,292	i usually fill up - depending on the price and how the car is running - 75% unleaded and 25% higher octane (whateva is available). i do it now and again when the car is feeling sluggish to give the injectors a little clean. i can feel the difference in how the car runs. it's much more smoother and repsonds quicker too. with that ratio i use, i couldn't see the ECU having to do much more work than normal. i filled up on the mobile premium (can't think of the name) and unleaded 2 weeks ago and felt the car made a big difference. then filled up w/ unleaded and vortex on the wkend, and the car's performance hasn't changed much at all. so who knows. but it definitely doesn't do any harm. and vaughan, u get 5% off as a TAFE student?! no fair! do u think i could get the same as a teacher on a measly wage? lol hahaha __________________ I don't need drugs. I'm just high on twisties

08-02-2006, 11:50 PM	#5
bourbon The Hairy Mod Join Date: Sep 2005 Location: southside ya'll and North Side, Brissy Car: MINI Cooper S 2003 Posts: 8,110	they say you should run 3 or 4 tanks of normal unleaded...then 1 tank of high octane to keep the system cleaner __________________ For All your crash repair panels & lights, clear lights contact us at PANEL HOUSE 45 RANDALL ST SLACKS CREEK QLD 4127 PHONE : 07 3808 8737 FAX : 07 3808 8735

08-02-2006, 04:42 PM	#3
skippy Resident Dissident Join Date: Sep 2004 Location: Ole Sydney Town Car: Alfa 156 TS Posts: 1,197 View Photos By: skippy	As I am told not really a problem more just making your ECU work a bit harder to adjust constantly, you might not get the full mileage out of your premium petty but that is the only drawback I hear. If you use same petty consistantly you will get better performance and mileage out of it, I am trying that now, going 95 RON at Caltex as 4c off and 5% as a tafe student. However going to old dodgy servos is not recommended as petty does go off and slimy or something, but yeah newer place with high turn over is the one you want. Ever picked up a load of petty and you car just went gutless on you, happened to me badly once driving for 30 mins odd all fine, fill up as it Tuesday arvo anyway within 2 kms car is pinging no power and yeah was crap till that load got diluted out. IMHO