TL;DR: The belief is that the servo right on the off-ramp gouges you because you are captive — tank low, already off the highway, not driving three suburbs deep to save a few cents. So we measured it. Inside Brisbane metro, the trunk-road and off-ramp servos price at a median of 187.9 c/L — the exact same middle as the metro as a whole, 187.9 c/L across 437 servos. The dear tail is no dearer either: off-ramp servos top out at a 189.9 c/L p90, below the metro-wide 190.9. There is no off-ramp premium. Being on the ramp does not lift the board. A handful of individual servos do sit dear — 199.9 c/L, about 12 cents or roughly $6 over the metro middle on a 50-litre fill — but they are dear brands on dear corners, and they sit inside ordinary suburbs, not on the ramp. The off-ramp is not the villain. It never was.
I run dual-fuel LPG in an old Commodore, so unleaded is not my tank. But I drove a courier route across the southside for twenty years, and I have filled the work ute off the M1 more times than I can count — pull straight off the ramp, fill, back on, do not think about it. Everyone reckons those off-ramp servos have you over a barrel. So we counted whether the map backs it. It does not.
The claim
The off-ramp servo has a captive audience. You are already off the highway, tank is low, you are not driving three suburbs deep to save a few cents. So the belief is they charge more because they can. Fair theory. The question is by how much — and whether the number survives once you measure it honestly instead of eyeballing the dearest board you remember.
What we checked
Every price here is the Queensland Government price feed — the price each servo reported charging, not a driver’s guess at the bowser.
Same patch as every post in this series: every servo within 30 km of the Brisbane GPO — 473 of them, 437 of which quoted unleaded across the trailing two weeks. That is “Brisbane metro” for us, and it is a hard line. If a servo sits outside 30 km of the GPO, it is not in this post, no matter how dear its board. That rule matters here more than usual, because the folk belief is built on the lonely servo out past the edge of town — and the moment you let those in, you are no longer measuring Brisbane, you are measuring the highway between towns.
There is no road map in our data, so I tagged each metro servo by its road class from the feed — the ones that sit on a motorway, a trunk road or a highway link, the roads you actually come off a ramp onto. That is 75 servos: the off-ramp and trunk-road population. Then I compared their price levels against the metro as a whole. ULP is plain unleaded. Prices are levels over the trailing fortnight, not one afternoon’s snapshot — closing price per servo carried forward, then the middle of the run, so a servo that flashed a dear board for one day does not get counted as a standing rort. The metro-wide middle on this basis is 187.9 c/L across the 437 servos that quoted unleaded; that is the yardstick every number below is measured against.
What the data shows
There is no off-ramp premium. The median metro off-ramp or trunk-road servo prices at 187.9 c/L. The median metro servo overall prices at 187.9 c/L. Same number to the tenth of a cent.
It is not hiding in the tail either. If the ramp servos gouged, you would see it at the dear end — a fatter p90, the “worst captive site” running dear. It is the other way. The off-ramp p90 is 189.9 c/L; the metro-wide p90 is 190.9. The dear tail of off-ramp servos is if anything a touch cheaper than the metro dear tail. And the floor is level too — off-ramp p10 179.6, metro-wide p10 179.5. Top, middle and bottom, the off-ramp servos sit right on the metro distribution. Being on the ramp moves nothing.
But some servos are dear — just not because of the ramp
None of this means every servo is the same price. It means the ramp is not what makes the dear ones dear. Plenty of servos sit at 199.9 c/L on a standing basis — about 12 cents, or roughly $6 on a 50-litre fill, over the metro middle. But when you look at where they actually are, they are dear brands on dear corners deep inside ordinary suburbs, not servos perched on an off-ramp:
- EG Ampol, Abbotsford Rd, Bowen Hills — 3.7 km from the GPO, on a suburban trunk road, standing at 199.9 c/L. Nowhere near a motorway ramp.
- Ampol, Sandgate Rd, Nundah — 8.6 km out, a busy suburban artery, also 199.9 c/L.
Same 199.9 board people blame the off-ramp for — but these are inner-metro corners, not captive ramps. The dear number is real; the off-ramp explanation is not. It is brand and corner, the same story as the same-brand and across-the-road posts. If you want to know why a servo is dear, look at the sign on the pole and who else is within a two-minute drive, not whether there is a motorway nearby.
The verdict
There is no reliable off-ramp premium in Brisbane metro. Off-ramp and trunk-road servos price at the same 187.9 c/L median as the metro overall, and their dear tail is if anything a shade lower. Do not U-turn to avoid the ramp servo on the theory alone — the odds it is dearer than the servo three streets deep are no better than a coin toss. Some servos gouge, at 199.9 and about $6 a fill over the middle, but you cannot pick them from the fact that they sit near a highway. You pick them from the price on the board.
So what for you
Pull off at the servo on the ramp if it is convenient. On the metro numbers it is no more likely to fleece you than the one you would drive three suburbs to find. The thing that actually decides your fill is not the ramp — it is which brand is on the pole and whether a cheaper servo is genuinely close. Pinly Fuel shows you the price at every servo around you off the QLD Government feed, so before you commit to the off-ramp bowser you can see whether a cheaper one is a couple of minutes away — because that is the number that decides it, not the ramp.
The honest limit
Two things to keep this straight. First, this is a Brisbane-metro read — 30 km of the GPO. I deliberately did not measure the lonely servo out past the edge of town, the one on the Bruce between towns with no alternative for fifty kilometres. That servo may well gouge, but it is not in Brisbane and it is not what most drivers hit on a daily fill, so I left it out rather than smuggle it in to prop up a premium that the metro data does not show. Second, “off-ramp” here is a road-class tag from the feed, not a surveyed access ramp — I am reading which servos sit on motorways, trunk roads and highway links, not standing on the ramp with a clipboard. The solid read holds either way: inside the metro, the ramp does not lift the board.
If you run a ute, diesel does not ride the unleaded cycle and looks to be even more brand-driven than this once you match within range. Tom is measuring the diesel side of it on his own map — same window method as here, standing levels over the whole window, so a servo has to sit dear most of the year to make his list, not just flash a dear board on the day.
— Shane