Originally Posted by
rcbence
So I have an HPI savage 4.6 and firestorm. Bought a case if werks racing fuel last year. Both my 4.6 and g3.0 didn't last over 1 1/2 gallons.
I broke them in on the fuel using HPI idle method then running them after. Never let the temps get lower than 200f.
Engines didn't last. Sure I had some lean runs not being aware of the oil content. I'm sure I reduced the life instantly every lean run.
Never could get a solid lsn tune on either engine. Honestly had better luck with traxxas 20% fuel.
Both engines sure enough had the pistons go past tdc wear mark when disassembled. Lost compression when warm and lost holding a solid tune.
I'm not blaming the fuel 100% but will no longer run a fuel with so little oil. Especially the first few tanks when the piston is mating to the sleeve.
Werks has 6% total oil with a simple evaporation test.
Measured 300cc of fuel and poured in a tall glass. Lett it sit out a day and 80% was evaporated. Finished off with a heat gun barely holding a boil and was left with just oil.
Put the oil in my Byron's lube booster measuring cup that holds up to 1 oz or 30cc.
Poured all in and got 18 cc of oil. 300cc × .06 is 18cc. Simple.
I find it amazing people saying.....wow! This fuel is solo good! It just revs up and get longer run times!.
I can do that too. Here's how.
Buy nitro. Buy methanol. Buy some klotz benol.
Mix 20% nitro. 5-6% castor and rest methanol.
More energy stored means longer run times and better revs because of less oil. Simple. That's how to make a solid race fuel.
I'm sure the pure 6% castor would protect better as well than a castor/ synthetic blend at 6%.
I did test traxxas power plus too.
Guess how much?
Most say that its crappy oily fuel. Runs hot smokes a lot must have 16% oil.
Nope. Its 10% total. 200cc of fuel. 20 cc was left over.
That's right. Less oil than byron race 2000 which is 12%
I find this hilarious in fact. That traxxas has less oil than everyone thinks. Now they say its a blend....but I believe its mostly castor. The smell while burning....plus the oil that's left behind is fairly sticky.
To make sure I'm actually close to the oil percent I tested some omega I have that claims 17% oil
This one I just measure up 100cc of fuel. If there's 17cc of oil then we got 17%.
And it showed about 16.....so close enough. Might be off 1% at the most.
So traxxas has at least 10% but no more than 11% oil.
Amazing how much more oil plane engines can handle without loading up real bad at idle. Not sure why car engines just don't run as good with 18% oil. Properly tuned on low speed they load up badly at idle and never really clear out unless you stay at wot.
I believe that the recomendations by the manufacture are to get going fast and to go fast for racing. The low oil content may be fine for max speed but methanol fuel just needs more oil than gasoline. Not to mention the small size and lack of a rod bearing. So for sport you probably need about 18 to 20% oil.