My new OX required Lucas full synthetic 75w-140 which we ordered from Summit Racing as my local parts stores did not have that exact spec. https://lucasoil.com/products/gear-oil/synthetic-gear-oil/lucas-sae-75w-140-synthetic-gear-oil
The oil for the engine should be based on builders clearance specs. If stock a full synthetic 5w-30 is what my Camaro LS3 uses, if it has a lot of time/miles on it a 10w-30 may be a suitable choice. We run Amsoil in the LS3 but there are plenty of good choices out there in todays market place. I would stick to a 25-50 hour change cycle based on how the oil looks and your style of ride. Mrs. Branch (352)797-9910 is an Amsoil dealer and stocks most of the products in the shop if your local to them. (Area SR50 / US41)
As far as a oil filter goes we use the NAPA Platinum or K&N on the LS3. NAPA is made by WIX
If you watch the NAPA web site they put them on sale every once and a while for $6 which is a great price anymore. We purchase online and pick it up in the store. https://napafilters.com/filters/oil-filters/light-duty-oil-filters/platinumnapafilter-oil/
https://www.napaonline.com/en/p/PFL41042
