Hi, need to change oil and filters on a Isuzu, boat book advises API CC 15W/40, however struggling to find that, and I think from receipts on boat , it was last changed with10w/40, so would this be acceptable, its the cheapest I can find of that spec-http://www.classic-oils.net/Morris-Classic-Marine-10w40
Also have looked at Isuzu filters, apparent Isuzu filters, on e bay come to- oil, fuel and air;=£45
. whereas
-http://www.inlinefilters.co.uk/ =£25,big difference, I only looked as have been advised on here b4 in previous threads, are they as good as the dealers filters ?
Thanks for any thoughts.