08-21-2018 05:23 AM - edited 08-21-2018 05:24 AM
If condition has only started since engine oil was replaced then was new oil same brand and spec as oil removed ?
for example if engine has been filled with a single viscosity oil instead of a multi viscosity oil (multigrade) then this may explain condition. As engine load increases then oil temperature will also increase and with single viscosity oil the pressure will drop off more than with a multi viscosity oil which has viscosity index improvers in additive package that minimise the drop in viscosity.
08-18-2018 08:28 AM