S-Oil Lubricants CI-4 15W-40 200L Drums in Stock
Posted by Nick Flavel on 8th Jun 2026
S-OIL 7 BLUE #5 CI-4/SL 15W-40 – Proven Protection for Hard-Working Diesel Engines
When it comes to keeping diesel engines running reliably, sometimes the best solution isn't the latest specification oil—it's the right oil for the job.
At Filter Discounters, we currently have excellent stocks of S-OIL 7 BLUE #5 CI-4/SL 15W-40 available in 200-litre drums, with additional stock arriving
…
Castrol RX Super 15W-40
Posted by Filter Discounters on 23rd Jun 2014
Upgraded from CI-4 to CI-4 PlusDid you know Castrol upgraded their RX Super 15W-40 from a CI-4 rating to CI-4 Plus?This lubricant is suitable for mixed diesel fleets without DPF's.This provides iImproved performance over API CI-4 oils in 3 key areas:
- Better wear control through greater soot loading capability- More base reserve (TBN) to meet requirements of EGR engines- More viscosity control t
…