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Reply to "Delo 15w40 for all my vehicles"

quote:
Originally posted by Gurkha:
Any CD and above diesel oil exceeds the best petrol standards by miles, diesel oils are designed for far more hostile environment and are way more shear resistant, makes sense in using it in gassers, take a look at UOA of HDEO like Delo 400 and Delvac in motorcycles and you will get an idea of their qualities, they excel all the expensive fancy motorcycle oils as well. I use Delo 400 in my diesel, petrol as well as gensets and my motorcycle, all bear testament to the attributes of diesel HDEO which IMHO are the best values out there on the market.


That's true but they are also less converter friendly. The heavy additive package can cause premature converter plugging. On the other hand, most new CJ-4 diesel engine oils also meet the SM gas engine API category due to their reformulation to prevent particulate filter plugging. As long as the oil meets the new CJ-4 spec. you should be OK. I personally would not go with a 15W/40 weight though. If you must use a diesel oil in your gas engines I would go with a 10W/30 weight.
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