I'm really after opinions on synthetic Vs mineral.
Lots of blurb about, but actual real world use is best.
I picked up somewhere in the manual to use oil for diesel engines if no other available. Probably not too critical then.
Not looking to start up old debates here. A link to an argument would be great.
Reduce torque settings if oiled threads??? Aaaargh! What is a torque setting?
Or: that is counter intuitive. Please explain.
I use type 5 synthetics exclusively, Red Line to be specific. The biggest benefit to it is reduced wear on startup, which is where the most damage happens. The Type 5 just clings to parts longer and even stays put in places when other oils simply just drain away, leaving you to start up dry. After 15 years of racing a 250+ HP Buell on the salt flats and a much lower HP one in the club circuit and never seeing any significant wear and tear and scarring and such or having oiling related failures, that's all I trust in anything I have with an engine, tranny or differential. I even use Red Line in my power steering. Another company that makes a good type 5 is Maxima.
The diesel oil thing is a bunch of crap IMO. It's really about people doing something to make others think they are special or cool. It has additive packages designed for the blow-by specific to diesel combustion gasses and for the higher pressures exuded on bearing and wear surfaces. That said, any oil is better than no oil, which is why the manual states to use diesel if no other is available. Our long stroke air cooled V-twins are brutal on parts. Just don't use it as a first choice.