Gull's E10 fuel

[cat007]

So - since this has been on the market for a few years now in NZ, what are peoples real life experiences with it?

Would be keen to hear from people in high comp N/A's to high boosted engines to basic every day cars....

[2jayzgte]

Is this fuel any different to Mobil's Synergy 8000???

[loudstealthGT-Four]

Just started using E10 a couple weeks ago, mixing 10% ethanol with 95, as there is no easy supply of 98. Seems to run better, though have no actual evidence of this. And it smells pretty good too

[Townace]

My late model cefiro daily loves the stuff. Lots of pinging on part throttle if I run it on any other fuel.
Returns better economy than any other fuel either which is the confusing part

[QikStarlie]

just a touch better than bp 98 in my experience, but not much at all in it. this is in a turbo car pushed to its octane limit. run it in my hi comp na 4age also.

best stick to what your car is tuned for. will run a little leaner on e10 than bp98.

[Heylin]

Gary Capper tuned our Legacy GT and advised to go for BP98 over E10 (Gulls 98).

[edwagon]

I always run either BP 98 or E10 in my Aristo

I think it goes better on e10 - feels like more part throttle torque

[Leon]

WRX used a lot more petrol with E10 than even on Z 95.

Like more than 10% more

[Bazda]

E10 is not very consistant in the octane rating i've been told.
So if you tune on E10, another batch could out the tune out.

[Lith]

E10 is not very consistant in the octane rating i've been told.
So if you tune on E10, another batch could out the tune out.

For what it's worth a car I tuned for flex fuel has had Mobil 98 poured into an empty tank and measured very near 10% ethanol - though one of the things that should really be obvious anyway, but becomes easy to appreciate is that having straight petrol in a tank then filling up with an ethanol blend doesn't suddenly bump what is in the tank to that ethanol percentage, even filling up on E85 into a tank which *seems* nearly empty of straight petrol usually tends to result in maybe slightly over E70 in the tank.

Say for sake of argument if you are getting ready for a dyno tune and decide to fill up on Force10, you could have say 15 litre of petrl still in the tank then you pour a further 30litres of E10 in there to get ready for your dyno tune... if you ponder the volumes involved:

Original 15litres petrol = 15litres petrol (funnily enough being 0% ethanol )
New 30 litres Force10 = 27 litres petrol (90% petrol) + 3litres ethanol (10% ethanol)

So you end up with 45litres of fuel in the tank, 3 litres of which are ethanol - which turns out as "only" 6.6% ethanol, which can have a tangible effect on the tuning requirements.

[l SIC l]

When the R35 arrives I'll install the Cobb V3 Accessport and have maps for 95, 98 and E85. With the 98 tune, do you think I should run two separate maps for BP 98 and Gull 98 though, or won't that be necessary?

[Lith]

So long as it isn't too aggressive it should be fine - there are plenty of cars running around which run on both perfectly reliably, I'd just tune it on BP98 and make sure there is a little bit of "fat" in the mixtures in case it ends up running E10, closed loop lambda should cover most of the cruise around stuff and really it won't make a big difference.

[l SIC l]

Good point. I think it can run 4 maps anyway (and can switch between them in 40 seconds or so), so I'll see if it's necessary from my tuner whether or not to bother with running a second 98 map for E10. I think the main issue was with pre-06' motors developing seal leaks running E10, wasn't it?