Just seen a mechanic for a service , supplied him with my left over 15w-40, and he almost had a fit . Showed me his book of engine specifications and oil info and shows that 10w-40 is the factory recommendation for the zd30, and that I should NEVER use mineral 15w and only synth 10w. According to him 15w can cause long term damage. But have had my trol for a year now and only been using 15w diesel specific. Can anyone shed some light and provide some input on their experiences with 10w (non diesel specific types, full synthetic )

Sent from my HTC_0PKV1 using Tapatalk