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#4523251 - 09/22/17 02:51 PM Using up boat fuel
otis24 Offline

Registered: 10/30/05
Posts: 1659
Loc: South Dakota
I probably have at least 10 gals of boat fuel: gasoline with TCW3 mixed at a 50:1 ratio. Rather than stabilize it till next summer, I would prefer to use it up in my automobiles. How much should I dump in a 20 gal tank prior to filling so that I don't have too much oil? I don't mind "over diluting" it to use it up but would like to get the cleaning benefits of the TWC3 if possible. Would probably run it in my 91 Chevrolet K1500 primarily.
1991 Chevrolet K1500 (4.3, 4x4, 86k miles)

2016 Dodge Grand Caravan
(3.6 V6) 46500 miles

#4523255 - 09/22/17 02:55 PM Re: Using up boat fuel [Re: otis24]
CT8 Offline

Registered: 10/09/14
Posts: 11230
Loc: Idaho
5 Gallons per tank.
"Don't let your preconceived notions get in the way of facts."
Geoff Metcalf

#4523261 - 09/22/17 02:59 PM Re: Using up boat fuel [Re: CT8]
oldoak2000 Offline

Registered: 07/23/14
Posts: 119
Loc: North TEXAS
Originally Posted By: CT8
5 Gallons per tank.


#4523265 - 09/22/17 03:03 PM Re: Using up boat fuel [Re: otis24]
JHZR2 Offline

Registered: 12/14/02
Posts: 41891
Loc: New Jersey
I burn up my remnant 2-cycle mix in my lawn mower.

#4523294 - 09/22/17 03:32 PM Re: Using up boat fuel [Re: otis24]
bullwinkle Offline

Registered: 10/09/04
Posts: 7727
Loc: Cincinnati, OH, USA
2-stroke won't hurt a thing-I put mine in the Cherokee, I figure a little more oil won't hurt the noisy old beast!
06 Ram 3500 CTD 4X4(FG Venturi), 93 GMC C3500 6.2, 89 F-450 7.3, 98 XJ 4.0(XG8A), 05 xB(XG3600), 15 Transit 3.7, 03 Merc Grand Marquis 4.6 2V(XG2)

#4523299 - 09/22/17 03:38 PM Re: Using up boat fuel [Re: otis24]
BrocLuno Offline

Registered: 09/06/15
Posts: 5617
Loc: Kalifornia Kollective
It will eventually ash cake the CAT. Run as little oil as possible in a CAT equipped car or truck. 2 gallons in 20 would be all I'd tolerate. The rest would get mixed richer and run in chainsaws, weed eaters, etc. smile
Formerly in marine engineering. In an earlier life I owned my own petroleum tank truck, and hauled for the majors and independent's.

#4523301 - 09/22/17 03:42 PM Re: Using up boat fuel [Re: BrocLuno]
4WD Online   confused

Registered: 09/21/10
Posts: 6538
Loc: Texas
That's what I was thinking -not too much - and my BIL burns trash at his place 👹

#4523411 - 09/22/17 05:45 PM Re: Using up boat fuel [Re: otis24]
andyd Offline

Registered: 09/25/04
Posts: 7273
Loc: Marshfield , MA
I would use it in whatever consumes the most gas the fastest. I would use 2 gallons at a time. 50:1 is just good UCL
'16 Camry LE STP synth 0w20 and STP filter. the Fridge

1994 Ranger ,the Rat, 5w30 dino, STP filter

'16 Camry SE, Valvoline HM 0w20 and OEM filter
Thick oil is better grin2

#4523413 - 09/22/17 05:48 PM Re: Using up boat fuel [Re: otis24]
fdcg27 Offline

Registered: 09/25/09
Posts: 15838
Loc: OH
TWC3 is made to burn cleanly, so there should be no issues with any part of the fuel injection system or the cat.
Motor oil isn't made to burn cleanly yet cars can run for a very long time with no issues using a quart each K or so without issues.
You're also talking about maybe five gallons of mix in twenty gallons of fuel over two tanks on a one-shot basis.
I doubt that this would cause any harm. At 50:1, you're talking about 2.5 oz of TWC3 per gallon, which seems unlikely to do any harm.
17 Forester 12K MSS 0W-20
12 Accord LX 86K PP 5W-20
09 Forester 95K M1HM 10W-30
01 Focus ZX3 118K PP 5W-20
96 Accord LX 104K T5 10W-30
95 318i

#4523449 - 09/22/17 06:44 PM Re: Using up boat fuel [Re: BrocLuno]
nthach Offline

Registered: 01/02/04
Posts: 3985
Loc: California
Originally Posted By: BrocLuno
It will eventually ash cake the CAT. Run as little oil as possible in a CAT equipped car or truck. 2 gallons in 20 would be all I'd tolerate. The rest would get mixed richer and run in chainsaws, weed eaters, etc. smile

New OPE have cats in them - and my parent's Echo chainsaw from 2004 has a catalytic muffler. If the stuff is TCW-3 or JASO compliant, it won't hurt the cat.