Quote Originally Posted by rna800 View Post
Just had my 90k km change oil and oil filter at Speedyfix. I even met sir Migs aka speedyfix. I tried Royal Purple 15W40 at 600 per liter, so far so good, mas mura pa kaysa sa Torco that Isuzu used before. Sayang hindi compatible ung LF 689 (Fleetguard) na oil filter that I bought from sir Bayen, so no choice, VIC oil filter tuloy ang bagsak ko.
YUP sir, and this fully-synthetic Torco SD5 15W-40 even has lower Total Base Number (TBN) of 8 ppt potassium hydroxide compared to this very cheap heavy-duty multi-grade Shell R3 X oil containing 11.5 TBN. Even the vaunted ester type fully-synth Motul CRDi Specific 5W-40 only has 8 TBN same as the heavier Torco. This actually made me jumped to Mobil1 Delvac Gold 5W-40 as it contains plus 12.0 TBN other than its kinematic properties and is fully synthetic. I have yet to get an Amsoil diesel oil from Manila, if any, as i've used it in other countries.

At this time though, i'm using that cheap Shell R3 X oil vefore i change again to Mobil1.