Equipment that outlasts the trend.
Detailing is the corner of car gear where the marketing runs furthest ahead of the evidence. Pressure washers are sold on a number the manufacturer supplies, polishers on a maximum speed nobody uses, and coatings on a durability figure measured by the company that wants the durability to be high. Where a real measurement exists we print it with the conditions attached. Where it does not, we say that instead of filling the gap.
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Polishers
Your first dual-action polisher
Decided on weight and noise, because those are the two things anyone has measured. Where the published test and the forums disagree, both are shown.
5.8–8.6 lb · 62.8–91.0 dBA
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Pressure washers
The psi on the box is not a measurement
Every round-up prints the manufacturer's pressure figure. The one source that put a gauge on the line read 1000 psi through a car-washing nozzle.
1.1–2.6 gpm claimed
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Vacuums
Two labs measured suction. In different units.
Car and Driver prints inches of water, MotorTrend prints kilopascals, and neither converts. Ten vacuums put on one scale — where the car-wash machine beats four of them.
4–22 kPa measured
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Tool
Dilution ratio calculator
Any bottle, any ratio, both readings of what “1:10” means — because brands do not agree and picking one silently gives half of you the wrong answer.
1:4 to 1:128
What this section recommends
One product per page, each chosen on the measurement that page reports. Amazon holds the live price; we do not copy prices onto the site.
Check priceDyson Car & Boat
Joint-highest suction at 22 kPa, and the lightest machine that manages it
from Car vacuums: two labs measured suction in two different units
Check priceWestinghouse ePX3500
The quietest of the four at 70.0 dBA
from Pressure washers for cars: the psi figure is not a measurement
Check priceGriot's Garage G9
The lightest of the serious tools at 5.8 lb
from The best dual-action polisher for a beginner, by weight and noise
Product photographs: Dyson, Griot's Garage, Westinghouse.