KLEENOIL Engine Applications

THE CHALLENGE

Volvo B7 engines were known for excessive soot generation. Frequent oil and filter changes increased costs and downtime. EYMS needed a way to reduce oil-related maintenance while keeping buses on the road, ensuring reliability for daily passenger operations.

KLEENOIL’S SOLUTION

In 2010 , EYMS began trials with Kleenoil filtration and independent oil analysis by Millers Oils . Based on early success, the system was fully installed across the fleet in 2012 , first on the B7s and later extended to the B9s.

The maintenance approach was adapted as follows: Kleenoil cartridge changes every 10,000 km. Oil & standard filter changes at 60,000 km. Regular oil sampling during each service interval.

In many cases, the original spinner filters were removed, saving an additional £40 per bus per month .

RESULTS ACHIEVED

Oil Analysis & Cleanliness

Independent oil testing confirmed oil quality remained in good condition after 7 months without an oil change (see analysis reports on page 4). Water contamination remained zero . Soot and particulates were dramatically reduced, with only a minor increase that was considered normal for operating conditions. Cost & Labour Savings By using Kleenoil cartridges instead of full oil changes, EYMS saved on: o 5 out of 6 oil and filter changes . o Significant labour time and downtime (cartridge swaps take 15 minutes vs. full service). Across a fleet, even small per-vehicle savings compounded into substantial cost reductions. Reliability & Longevity Cleaner oil reduced engine wear and breakdowns. Longer oil life meant less unscheduled maintenance , improving fleet availability.