I am looking to scale down on the different oils I buy and stick to one oil for all my applications, perhaps excluding the Jaguar which only gets one oil change a year, if that. As far as drain intervals go, on all non-GM vehicles I am looking at 5,000 km/3000 mi. GM vehicles will follow the OLM with a simple drain/refill at the 50% mark (usually ~7,500 km/4,690 mi). Given local operating conditions:
- High sulfur gasoline (Euro II with 500 ppm sulfur) in non-emissions equipped vehicles. Vehicles with emissions use Euro V with 10 ppm sulfur
- Extreme heat up to 130Â°F
- 80% stop and go driving in heavy traffic with excessive idling and AC
- Super fine dust/sand particles in the air
The Explorer (Cologne SOHC 4.0 V6), Pajero (6G72 SOHC V6) and Grand Marquis (modified 4.6L with Stage III cams) I am not worried about - all of them are equipped with a factory emissions delete required for Middle East exports at the time to run on leaded gasoline. The Expedition (4.6L), Envoy (4.2L) and SRX (3.6L) are the ones with emissions with the following requirements in the manual: Expedition: 10W-30 meeting API SL Envoy: Temperature/viscosity chart ranging from 0W-30 to 20W-50 meeting ACEA A3-02 SRX: Temperature/viscosity chart ranging from 0W-30 to 20W-50 meeting ACEA A3-04 If memory serves me right, API SL had a sulfated ash limit of 1.5% and ACEA A3 is >0.9 and <1.5. I don't have an issue with oil burning in any vehicle, and given the API SN dual rating, I do not think it will pose a problem. Any input would be appreciated.
The results of the trial showed that Duron HP 15W-40, a conventional mineral oil-based diesel engine oil, performed like a synthetic and resulted in extended drain intervals of up to 50% from 500 hours to 750 hours, with one unit lasting up to 1,100 hours.