Is there a minimum fuel requirement when using Redline S-1 or other additives?

[NattyBoh]

I’m trying to time this OCI with some Redline added to the fuel ( looking to change it next weekend and have my fuel close to empty )

But I was wondering if there is a minimum amount of fuel that needs to be in the tank. Redline says zip to 20g, the Civic has a 12g tank. Would if it okay to add to a 3/4 full tank?

Or should I add it to a full tank and then just do my OCI when I want. And then fill up again at whatever level the fuel gauge is at to dilute it more into the maintenance dose? Does that make sense lol

 

[CharBaby]

It's always best to add the fuel system cleaner first and then fill the tank. Often, but not all vehicles gas tanks have a check valve down past the filler tube. Honda's were known for this. And if you just pour in the cleaner, it could just sit there. Maybe it'll weep in over time, who knows?

I'd put in the whole bottle and then fill the tank and run the car till the tank is almost empty before refilling as the directions state.
I realize that the directions on Sl-1 are somewhat vague but you're not going to overdose by putting in 15oz into a 12 gal tank. It states that Sl-1 can be used with up to 20 gallons and doesn't actually specify minimum gallons it can be used with.

 

[Jetronic]

PEA additive like used in Red Line works from very low concentrations, it just take longer to achieve the same result. Top Tier fuels use the same additive at very low treat rates, likely comparable to 1 oz of red line per tank.

Because of varnish concerns it's not advised to run a lot of PEA through an engine over the course of an oil change interval, and running one big hit before an oil change is ideal.

I would run the treated tank close to empty then another untreated before changing the oil, so not any PEA (it's not likely to burn off in the cylinder) is going to wash down and sit in the fresh sump of oil.

 

[NattyBoh]

I thought that we were supposed to get the additive in, run that tank out and change the oil right after? Is running another tank of fuel/another week of driving on that oil okay?

 

[TCL]

I thought that we were supposed to get the additive in, run that tank out and change the oil right after? Is running another tank of fuel/another week of driving on that oil okay?

perfectly ok....I woudn't worry if you had another five thousand miles before the oil change.....

 

[oil pan 4]

I’m trying to time this OCI with some Redline added to the fuel ( looking to change it next weekend and have my fuel close to empty )

But I was wondering if there is a minimum amount of fuel that needs to be in the tank. Redline says zip to 20g, the Civic has a 12g tank. Would if it okay to add to a 3/4 full tank?

Or should I add it to a full tank and then just do my OCI when I want. And then fill up again at whatever level the fuel gauge is at to dilute it more into the maintenance dose? Does that make sense lol

I'm finding that less is more with fuel systems cleaner. Hit it hard, I say run the bottle in the minimum recommend amount of fuel and run as much of the gas out of the vehicle as possible before refueling.

 

[NattyBoh]

I'm finding that less is more with fuel systems cleaner. Hit it hard, I say run the bottle in the minimum recommend amount of fuel and run as much of the gas out of the vehicle as possible before refueling.

Thats what I was wondering... what is the minimum hence the post. There isnt a minimum. Im going to email Redline.

 

[ARB1977]

I’m a bit overkill on SL1 at least one the Pilot. I run two bottles during olm cycle. One at 60% and the other at 20%. The Tundra gets it at 5K intervals. I use top teir in that. Wife use what ever in her Pilot.

 

[oil pan 4]

Thats what I was wondering... what is the minimum hence the post. There isnt a minimum. Im going to email Redline.

12 gallons is average for a small car.

 

[NattyBoh]

While true, I wanted to add it to about 10 gallons or so to try and time it with the weekend/oil change

 

[wlk]

Won't hurt a thing. I double dose if having a problem or bought a new to me vehicle, zero issues for over 25 yrs now.

 

[JimPghPA]

Red-Line SI-1 use to say on the bottle label that the proper maintance dose was 4.45 ml per gallon of fuel, which works out that the entire 15 oz bottle can treat 100 gallons.

I use the trip since last fill up divided by the MPG for that fill to calculate how many gallons are required to fill up. Then I multiply that by 4.45 to see how much RL SI -1 I have to measure out with a plastic graduated cylinder. I put that in just before fill up. Also, every 10,000 miles I put 1/2 a bottle in for two tanks. The engine runs fine.

 

[ChrisD46]

Red-Line SI-1 use to say on the bottle label that the proper maintance dose was 4.45 ml per gallon of fuel, which works out that the entire 15 oz bottle can treat 100 gallons.

I use the trip since last fill up divided by the MPG for that fill to calculate how many gallons are required to fill up. Then I multiply that by 4.45 to see how much RL SI -1 I have to measure out with a plastic graduated cylinder. I put that in just before fill up. Also, every 10,000 miles I put 1/2 a bottle in for two tanks. The engine runs fine.

Just a FYI for the above SL-1 maintainence dose to gas : 18 gal. = 2.7 oz. , 16 gal. = 2.4 oz. , 13 gal. = 1.95 oz.