Do you brim the tank?

[Deleted member 113659]

Well. You're never too old to learn. I didn't know there was a difference between filling the tank and brimming.

My original post should have been clearer.

I only ever fill until the pump clicks off. Job done. I think those that keep on filling to 4-5-6 clicks are a lil obsessive TBH.

 

[camerafodder]

Well. You're never too old to learn. I didn't know there was a difference between filling the tank and brimming.

My original post should have been clearer.

I only ever fill until the pump clicks off. Job done. I think those that keep on filling to 4-5-6 clicks are a lil obsessive TBH.

When you're filling up in the middle of the Kansas plains every click counts believe me! Especially if there's a storm brewing.

 

[telu]

I passed my test in September 1990 and I've never once been to the pump and not brimmed the tank.

I seem to chat to many people that just put a set amount in say £10, £20 etc.

So who fills up completely, and who fills up with whatever they feel like?

Ant.

To the brim always!!! Don't see why should I stop to buy fuel every other day!!!

 

[Palfrem]

Always to the top.

 

[christopherwk]

When your job involves driving 40,000 miles a year, I'm not going to put in £10-£20 worth every time I fill up! :crazy

Always to the top for me, when it gets to 1/4 full.

 

[Deleted member 113659]

When your job involves driving 40,000 miles a year, I'm not going to put in £10-£20 worth every time I fill up! :crazy

Always to the top for me, when it gets to 1/4 full.

Isn't that a little like waiting till near empty and then only filling to 3/4 full?

Ant.

 

[br0ke]

Never thought about if before but interpretation would be "filled" is to the click and "brimmed" is to the brim, ie until you can see it. Not much difference though, maybe a litre or so?

6L difference in the CLK. Once it clicks, it takes ages to see the diesel.

Also an average 5-8mpg difference between the computer and my calculation every time. Car says 37-40 and I get 28-32. Was much better when I was using it for work. Sometimes I got 35.

 

[Bobby Dazzler]

6L difference in the CLK. Once it clicks, it takes ages to see the diesel.

Also an average 5-8mpg difference between the computer and my calculation every time. Car says 37-40 and I get 28-32. Was much better when I was using it for work. Sometimes I got 35.

6 litres is a lot! I squeezed an extra litre in to on of ours yesterday, but stopped short of being able to see it.

 

[ph47mf]

In my younger days it was a tenner at a time etc (student loan wasn't much). Now I brim it every time just so I can check my shocking mpg.

 

[Crazyfool]

I can't seem to do it in the Merc, it just keeps dissapearing, but I do it all the time with the Audi.

 

[Dickie Fix]

The difference between full to the brim and full to the first click may not be so great these days (about 0.8l in our B Class) but IIRC, 25 years ago my firm's fleet Montegos would easily take nearly a gallon after the first click if you filled them too fast.

 

[190]

For consistency I used to fill it until I could see fuel in the filler neck but only if I was going top drive some distance. To fill up to the brim around the corner and park up in my heated garage risked the fuel expanding to much with the increase in temperature.

 

[Deleted member 126969]

Depends on which car it is. The Jeep does most of its miles on LPG so only uses petrol for starting and warming up a bit. Never put more than half a tank in that, usually about 1/3 as it's a huge tank and normally, I don't put petrol in for months at a time. Always brim the LPG though. The car the new MB will replace, always brim it. The Westfield, always brim that too, but it has always been a total PITA to fill due to the tank inlet design - constantly burps and shuts off the pump so have to fill really slowly. Good job it's a small tank.

The new MB when it arrives....good question. Given it's a C350e, I'm hoping we won't be using all that much petrol most of the time. Might try a half-fill to start and see how we get on. Most of our mileage is short trips. On a longer run I'd brim it beforehand of course. Already carrying 100kg of batteries, don't want to add to that by carrying a load of petrol I (hope I) won't need

 

[mat8n]

I brim, I like to get 100 miles before I see the gauge move.

 

[Submariner1]

These are exactly my two reasons for never putting more than 10/15 quid in.

Well that would start ner nicely, and get me home and then I'd have to go back and fill up

 

[hotrodder]

Not read the entire thread so might have already been mentioned but if you keep filling after the pump has clicked off once to 'properly' brim the tank then you increase the chances of liquid fuel overcoming the tank venting system even if you don't go mad enough to spill fuel everywhere i.e. if you can see fuel in the filler neck you've probably already pumped some into the venting system, both the filling vent that's closed when the cap is on and the active vent that the EVAP system uses
The EVAP system is designed for dealing with vapours and stopping the tank pulling a vacuum (as fuel is used) or becomming too pressurised (say filled up at night and parked in the sun all day, evaporative losses etc). Also liquid fuel won't do the charcoal cannister much good...

FWIW personally i usually do the £20 or so at a time, not because i can't afford to fill the thing up but because i only use a car a couple of times a week and much of the time filling it would last me more than a month. Modern fuels don't keep well and while it won't go off that quickly older cars (pre closed/active venting systems) have an open vent so you lose more from evaporation and more importantly the ethanol in modern petrol is hygroscopic so will happily absorb moisture from the air given the chance
On principle rather than penny pinching i do stick more in/fill up when fuel prices are rising every few days instead of paying more per litre in a weeks time. On the flip side when prices are dropping regularly i'd put less in even if it means filling again in a couple of days. Again on principle rather than saving a few pence