Premium fuel might be worth it
-
- I Fap to 440
- Reactions: 0
- Posts: 4952
- Joined: Sat Mar 30, 2013 2:39 am
-
- Damn, I just saw my Internet Bill !
- Reactions: 3
- Posts: 4420
- Joined: Sun Dec 09, 2012 3:04 pm
Well Akira I bow down to your knowledge. I always assumed high octane fuel basically offered more burning efficiency. Are you sure you tried pouring exactly 1L of gas in your bone dry Cub? I suggest you try it. Then drive on the highway at a constant speed (while carrying an extra 1L bottle of high octane fuel in a bag). Once it sputters out, try it with premium fuel. I averaged it out several times for fun with my bike on the way back from Sihanoukville once (via Kampot) and on premium it did 30km/l @80km/h, slightly less with regular fuel, though I would need to do it again with regular to see what the exact difference was. Not sure if the difference would be significant for city driving. No way for me to know my mileage in the city anyways...
Probably cost $10-11 a gallon too right? That's what I paid for race fuel for my Nissan. Smells so good and toxic ...mmm.DetroitMuscle wrote:101 octane was available at a Shell station back in Michigan in the US.... It was for drag racers I believe (legit drag straps, not fast n furious bs)
I even 1 upped that. You'll think I am a complete nutter probably after you read what I did, but here's what I did anyway.LexusSchmexus wrote:Are you sure you tried pouring exactly 1L of gas in your bone dry Cub?
Okay first off, I am a member of the Honda Super Cub Club in my local hometown and regularly contribute to club posts as well over there. We had a hypermiling competition to see who could get the best mileage. Since I was here and you can ride slow legally for long distances, I decided to give it a whirl.
The only way to accurately measure fuel economy for such small amounts, is to do very very precise measuring and fueling. The Cub's tank can hold 100ml of so of fuel after it's spluttered to a halt, which if you are measuring over 1 liter amounts, can vary your final mileage by as much as 20%. If you measure over 3.7 liters (my tank capacity), you're down to I think an 8% margin of error, but that still means your result would look like this. 94-106 mpg, which is a huge variation.
So what I did was fashion a 350 ml "fuel tank" that is a water bottle that hangs upside down from my luggage rack and plugs directly into the carburetor. It can run literally bone dry with no fuel left at the bottom. Anyway, the carburetor float bowl holds around 1 ml of petrol at the bottom below the jets, so the variation is negligible now with this new tank. Then I measure out 200 ml of petrol and fill up the small tank. I then keep my shifts consistent (1st at 10 km/h, 2nd at 20 km/h) and then bring the bike to 30 kph and hold it steady until the tank is completely empty. Then I did it again with premium.
Amazingly, my results were as follows with a .5% margin of error
1st run with regular: 292.5 mpg (124 km/l)
2nd run with premium: 289 mpg (123 km/l)
3rd run premix 16:1: 367 mpg (156 km/l)
Tires were at 50 psi, bike had a 16t sprocket (vs. 14), front tire for a rear tire (much less traction but less drag), and the rear suspension was locked (hardtail). That's it.
Normally the bike gets about 175 mpg around town on premix and 140 mpg on straight petrol.
Yeah, so that's what I did and premium made no difference at all. You'll see it was the same result within 1% of regular.
Sigh, you make me want that old fuel mizer back as my Scoopy averages 40 km/l.
- OrangeDragon
- I prefer K440 to bangkokbois
- Reactions: 6
- Posts: 10502
- Joined: Tue Jul 17, 2012 6:00 am
- Location: Riding a BlackGirl
- Contact:
When you say premix, do you mean like the stuff for 2 stroke engines?
Those who begin coercive elimination of dissent soon find themselves exterminating dissenters. Compulsory unification of opinion achieves only the unanimity of the graveyard.
Robert H. Jackson, West Virginia State Board of Education v. Barnette
Robert H. Jackson, West Virginia State Board of Education v. Barnette
When the uplift for premium is less then roughly 5%, I get premium, otherwise the regular.
Especially the more modern cars are able to run fine on both, it's just a matter of engine parameter matching.
Especially the more modern cars are able to run fine on both, it's just a matter of engine parameter matching.
Yep. Only works on carbureted vehicles because the fuel is slightly thicker, which means less gets pulled into the motor during the intake stroke, which means you burn less fuel and get better mileage. If you play with it, careful though, because lean fuel mixtures mean that it runs hotter and can also cause detonation along with other problems.OrangeDragon wrote:When you say premix, do you mean like the stuff for 2 stroke engines?
I wouldn't do with any vehicle that is more advanced than a simple moto because you can ruin the catalytic converter or damage any related emissions electronics.
Octane ratings refer to the "tendency to detonation" of a fuel under compression.
The higher the octane - the less "explosive" the fuel - under compression.
Pinging occurs when the flame propagation within the combustion chamber is too rapid/uncontrolled - hence the "knocking"
This can be very bad for an engine in the long term as it causes premature wear and poor performance.
The correct octane fuel for an engine will promote smoother running and better performance as the ignition and burn rate within the combustion chamber is correctly controlled.
Fuel in Cambodia is often not handled correctly and has "additives" such as water, kerosine and avgas....OK for a simple moto but not OK for a fuel injected engine.
Stick to the bigger petrol stations with good turnover and buy the premium fuel rated for your engine (see the log book)
Other poster's observations about better fuel economy reflect this.....
The higher the octane - the less "explosive" the fuel - under compression.
Pinging occurs when the flame propagation within the combustion chamber is too rapid/uncontrolled - hence the "knocking"
This can be very bad for an engine in the long term as it causes premature wear and poor performance.
The correct octane fuel for an engine will promote smoother running and better performance as the ignition and burn rate within the combustion chamber is correctly controlled.
Fuel in Cambodia is often not handled correctly and has "additives" such as water, kerosine and avgas....OK for a simple moto but not OK for a fuel injected engine.
Stick to the bigger petrol stations with good turnover and buy the premium fuel rated for your engine (see the log book)
Other poster's observations about better fuel economy reflect this.....
Agree, and I do not think any more power can be had from adding higher than designated octane.robboat wrote:...Stick to the bigger petrol stations with good turnover and buy the premium fuel rated for your engine (see the log book)
Other poster's observations about better fuel economy reflect this.....
"Not my circus, not my monkeys" - KiR
My car runs better on regular gas than anything else, here... Total's the most consistent. Premium from anywhere somehow knackers the timing and makes for a hard start when starting warm.
Sang tommada's the best call for old dinosaur 4x4s with no cat, computer, or fuel injection.
With no change in driving style or daily route, I can lose up to 20% mileage on a regular $20 gas purchase - basically, $20 gets me 100km from some pumps and 80km from others.
Can't be anything other than under-delivery at the pump.
Sang tommada's the best call for old dinosaur 4x4s with no cat, computer, or fuel injection.
Definitely best to measure your own... I've never trusted the delivery amounts stated at gas stations here.AK87 wrote:We had a hypermiling competition to see who could get the best mileage. Since I was here and you can ride slow legally for long distances, I decided to give it a whirl.
With no change in driving style or daily route, I can lose up to 20% mileage on a regular $20 gas purchase - basically, $20 gets me 100km from some pumps and 80km from others.
Can't be anything other than under-delivery at the pump.
-
- Where Did All the People Go?
- Reactions: 42
- Posts: 2555
- Joined: Fri Aug 27, 2010 12:04 am
- Location: RESISTANCE IS NOT FUTILE. IT'S VOLTAGE DIVIDED BY CURRENT.
Petrol Head wrote:
Ak, some stats for the Excellium at Total, which comes from Vietnam.
Octane: 95.0
Sulphur Content: 76 PPM
Benzene Content: 1.84% Vol
Oxygen Content: 1.10% Wt
Lead Content: <0.0025 g/L
Water Content: 570 PPM
Density at 15 degrees Cent: 0.7316 kg/L
Thanks for this.
Search engine is useful sometimes.
Fitting a 4 degree ignition advancer to one of my bikes this week, after which all fuel MUST have a RON value over 91.
-
- Similar Topics
- Replies
- Views
- Last post
-
-
Digibox Becomes Cambodia’s First Apple Premium Reseller
by Londo » Mon Jul 17, 2023 6:32 pm » in The IT and Techy Forum - 0 Replies
- 2710 Views
-
Last post by Londo
Mon Jul 17, 2023 6:32 pm
-
-
-
Is it worth buying a condo to live in? (PP)
by nerdlinger » Wed Dec 21, 2022 6:01 pm » in Houses, Apartments and Real Estate - 15 Replies
- 5284 Views
-
Last post by nerdlinger
Sat Jul 29, 2023 8:13 pm
-
-
-
Landfills worth more than US$10 million in Kep and Kampot inaugurated
by Londo » Tue May 30, 2023 2:35 pm » in Cambodia News - 3 Replies
- 402 Views
-
Last post by Baconroll
Thu Jun 01, 2023 8:00 am
-
-
-
Banks now create special teams to deal with HNWIs (High net worth individuals)
by Londo » Mon Jun 05, 2023 7:03 am » in Money, Banking and Insurance - 1 Replies
- 828 Views
-
Last post by Spigzy
Mon Jun 05, 2023 10:00 am
-