Great Britain Theory Test Coach
Vehicle safety and loadingQuestion 371 of 424

Why is spilled diesel dangerous?

  1. It greatly reduces grip between tyres and road
  2. It blocks the road drains
  3. It makes the road hot
  4. It hides the road markings
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Correct answer: It greatly reduces grip between tyres and road

Diesel on the road cuts grip. This is especially dangerous for motorcyclists.

Source: The Highway Code (Department for Transport, GOV.UK), Annex 6. Vehicle maintenance, safety and security, Vehicle maintenance

Practice vehicle safety and loading

Questions last reviewed: 18 October 2026