Heavy-Truck Engine Oil: Keeping Your Fleet Running

A heavy-truck engine runs thousands of hours a year, often under full load. The choice of engine oil has a direct impact on fuel consumption, oil-change intervals and engine lifespan — major cost factors for any fleet manager.

2026-09-15·5 min read

10W40 or 15W40: which viscosity for which use?

VEGATRUCK 15W40 remains the reference for fleets in standard road use, with an excellent protection-to-cost ratio. VEGATRUCK 10W40 is preferable for newer high-pressure injection vehicles, where greater cold fluidity reduces startup wear.

Mineral, semi-synthetic or full-synthetic?

Mineral — controlled cost, suited to older vehicles or low annual mileage.
Semi-synthetic — good protection-to-price balance for intensive road use.
Full-synthetic — longer oil-change intervals, better high-temperature performance, recommended for high-mileage fleets where labour cost outweighs lubricant price.

The case for a fleet supply contract

For a fleet manager, standardising on a single range (VEGATRUCK) simplifies maintenance logistics and enables volume pricing. MIDAN delivers in jerrycans as well as drums for in-house workshops.

Related range VEGATRUCK

View the range →

Frequently Asked Questions

In Short

Which oil for a Euro 6 engine?

Recent Euro 6 engines generally require a low-viscosity oil (10W40) compliant with the latest ACEA E standards — check the manufacturer's spec before standardising your fleet.

Do you deliver bulk volumes for workshops?

Yes, VEGATRUCK is available in fleet- and workshop-suited packaging — contact our team for a volume quote.