Originally Posted By: kr_bitog
I would suggest to pump the petrol after putting the additive so the additive will be washed down to the tank from the filling tube.
yep, biggest "issue" I can see....which is generally why it's recommended that most additives be used "prior" to fill up.....allowing the fuel to "wash away" the additive" down the filler neck/tube.
Mixing is no problem, we're not talking oil and water here lol. The additive is gonna mix no problem in the tank either way....but yea, when it comes to smallish doses of additives, particular for MMO (where you're only adding say 4-5 oz. depending on fill capacity), the marvel mystery oil, being an oil and all, tends to "get trapped in the filler neck/tube....I know I've seen it on my car, so I will usually do a "qick shot" or two of fuel down the filler tube, to make sure it washes down the additive when I'm filling up.....