Techron question.
#1
Racer
Thread Starter
Techron question.
Purchased some Techron fuel additive today but after I already filled the tank. The directions say to add to the tank prior to the gas. Has anyone added after topping off the tank? Car is running good just wanted to use as a preventative measure.
#2
Burning Brakes
It is better to wait until the tanks are to about 1/4 full so when you add it it goes into both tanks. Adding when full will only put into one side not both.
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#3
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I would wait until the next time you need to fill up with gas. You want to be sure that the additive is distributed to both tanks.
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CorvetteBrent (09-20-2018)
#4
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#6
Melting Slicks
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My tank was 5/8 full when the gas gauge failed five years ago. I added one bottle of this magic fluid and the problem was fixed within three miles. I continue to add a bottle twice a year usually to a full tank and have never seen the problem again.
#7
Le Mans Master
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#8
Melting Slicks
...I even run it in my '82 (crossfire injection, in tank fuel pump). My cars are not driven much; maybe three tanks of gas a year and one oil change a year so I splurge! Welcome to the C5 world!
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CorvetteBrent (09-20-2018)
#9
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If you are being fair to your car, you'll need to fill up within a week so just wait until then to add it.
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CorvetteBrent (09-20-2018)
#10
Le Mans Master
I never thought about when to add Techron. I usually carry the bottle with me and add it after I fill up at the gas station before I leave. Maybe not the best procedure but I've not had a fuel gage problem since I started doing this.
#12
Melting Slicks
Because of the C5 having 2 tanks and the way the system works (the passenger's emptied first), the best time to add Techron is when having less than 1/2 "tank". This will provide the most uniform mix in both tanks from the get-go.
When having less than 1/2 "tank", all the gas is in the driver's tank, so adding Techron and filling up provides the best way to assure a good mixing process in the driver's tank. Then, as the fill-up gets to the 1/2 "tank" point and continues to the full mark, the mix overflows to the passenger's tank though the crossover tube.
If Techron is added when the tank is above the 1/2 mark, most of it will remain in the driver's tank at the beginning, although eventually both tanks will tend to "homogenize" their content because gas constantly circulates between them.
For more details on how this works, check this great explanation from 8VETTE7. The following is a little fragment from it:
When having less than 1/2 "tank", all the gas is in the driver's tank, so adding Techron and filling up provides the best way to assure a good mixing process in the driver's tank. Then, as the fill-up gets to the 1/2 "tank" point and continues to the full mark, the mix overflows to the passenger's tank though the crossover tube.
If Techron is added when the tank is above the 1/2 mark, most of it will remain in the driver's tank at the beginning, although eventually both tanks will tend to "homogenize" their content because gas constantly circulates between them.
For more details on how this works, check this great explanation from 8VETTE7. The following is a little fragment from it:
So effectively the passenger tank empties first and then the drivers tank empties. But keep in mind that the fuel stream to the passenger tank and the syphone back to the drivers tank continues whenever the engine is running...
Last edited by GCG; 09-20-2018 at 10:43 AM.
#14
Melting Slicks
#16
#17
Melting Slicks
These are actually different tanks - the one on the bottom has the smaller hose that runs to the fuel neck and the other a fatter hose that connects to the other tank. Is the ‘jet pump’ in either of these?
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#18
Melting Slicks
It seems to me they are 2 sides of the same tank (driver's), as mentioned by the person who took the pictures
Last edited by GCG; 09-22-2018 at 01:09 PM.
#19
Team Owner
I use Chevron fuel as it all ready has techron in it. Never have to bother buying and adding it separately. Have had the vert for over 13 years and no problems with the fuel gauge stuff.
Last edited by tiojames; 09-23-2018 at 04:57 PM.