Brewtrolium... YAY or NAY??

[scratch]

 Joker said:

I skipped a lot of this

someone school me on Synergy 8000 from Mobil, simply what octane is it supposed to be? Seen on the net 'minimum 97.5' stated on the pumps & not even sure if its available in my location etc

http://www.mobil.co.nz/New_Zealand-English/PA/products_fuels_auto_qanda.aspx

as good as or better than BP 98? or does it fall into the 'dont use' category

I think it falls into the don't use category as it says contains 10% ethanol might not be suitable for all makes.

[Joker]

cheers, I created a bit of discussion on the CS fb page & hard t ofind info on it

[heylinb4nz]

When I had my car tuned at PBMS in Pukekohe they recommended BP98.

The 98 was the best overall balance for economy, power, detonation insurance and of course availability.

Might be a personal thing but i've always run all my performance japanese cars (NA and Turbo) on 98 octane...and as far as I know most of the performance stuff in japan requires a minimum of 96 octane, and preferably 100 octane to run at its optimum.

Putting 95 in (or some gull blend) might save $5.50 per tank but are you getting the same milage ? and is the engine running at its best ?.

[Marky]

You're misunderstanding the argument

98 octane is 98 octane, noone is arguing that it is preferable to run the best available. It almost always works out to be the best for economy (in terms of distance per $ spent) as well as safety/power.

However the Gull fuel uses a 10% blend of ethanol through it, which is the point of difference to the other NZ brands

Upsides: Runs cooler, meaning more power is possible through increased knock resistance. Bit cheaper per L too (I paid 1.71 this morning for 98 from memory).

Downsides: See above re possible corrosion - yet to hear of it in NZ mind you - and *slightly* worse economy.

I and many others have found definite improvements in power over straight petrol 98, the mileage difference I've found to be negligible (and possibly negated altogether by the extra timing possible at cruise and light load) the corrosion part... Dunno, only been 6000kms on it. It's been so common to use overseas and I've never heard of it causing any actual problems, but feel free to correct me here

Key thing as well is many cars can't see the ethanol content, and as it does need to run ever so slightly richer there is the possibility of them going lean, especially if it was a pinging half dead subaru to start with. Bosses KTM superbike gets a -very- slight miss at idle on it for example, but runs nicer everywhere else.

E85 is a whole new kettle of fish in comparison, if it was commonly available countrywide I'd go that way in a heartbeat, this is just the very mild version of it.

[Munkvy]

Mobil 8000 is also 10% ethanol in some areas (ie Wellington).