check and see if you can match the specification of the oils then ring the techies at the oil company customer service no. ask them don't leave sump to low if the oil pump drains dry they have a problem of not self primeing
Never had issues . Ive added synthetic oil to mineral . 5-40 grade to 20-60 visc . Diesel oil to petrol to top up and vice versa . On high output supercharged or turbo charged petrol and Diesel engines. NEVER had any issues ., I wouldnt use ATF or hypoid ( transmission) type oils . Seems the low visc oil in these engines makes priming oil
Pump an issue ? IMO I would use the higher visc in in the range Australia as we dont really have super cold conditions ..
My understanding is that while the oil companies will not recommend mixing brands all modern oils should be compatible. Having said that if you mix synthetic with non synthetic products you may not achieve all the nominated benefits claimed for synthetic products. Often today's oils are blended using a base product that is "thin" or low in viscosity say SAE20.The additive package incorporates a chemical called "viscosity index improver or VI". This additive causes the base oil to only thin out in high temperature operating conditions to the equivalent of it high specification eg in the case of a 5w-40 to what a 40 grade oil would do at the same temperature. Conversely in a cold environment it would not thicken up to more than a 5w oil would at the same low temperature. Thus today it is no longer necessary to use a "thick" oil in hot environments to ensure adequate protection as was the case before multigrade oils were the norm. Cheers,
-- Edited by Geeco on Tuesday 16th of January 2018 03:03:44 PM
-- Edited by Geeco on Tuesday 16th of January 2018 03:05:21 PM
