Originally Posted By: Julch
So I'm going to be doing my oil change this weekend - getting Pennzoil Ultra Euro 5w-40 and am trying to do half that and half Pennzoil Ultra 5w-30.
I can't seem to find Pennzoil Ultra 5w-30 anywhere though - only the new Pennzoil Ultra Platinum 5w-30.....this okay? Thoughts?
Hi Julch - Our Pennzoil Ultra is now called Pennzoil Ultra Platinum Full Synthetic motor oil with PurePlus Technology. Now, your 2014 Subaru Impreza WRX F4-2.5L DOHC Turbo asks for a full synthetic 5W-30, with API SN specification – which means that our Pennzoil Platinum 5W30 product, or our Pennzoil Ultra Platinum 5W30 product, could be used (of course, we would recommend our top-of-the-line Ultra Platinum product for this kind of performance engine).
We do not recommend mixing oil viscosities and/or additive packages from different types of motor oils. Not due to compatibility (because they are compatible), but due to a variety of technical issues – specifically, we cannot advise you on how to blend various motor oil products, and there would be no way for us to ensure that the mixture of the motor oils in your engine would then meet the minimum specifications required of the motor oil/Pennzoil performance claims/etc. - The Pennzoil Team