have anybody tried this already?

i'm planning to shift to this whiz motor oil for diesel for my 2 4ja1. its already a semi synthetic oil with ci4 spec with a 15w-50 viscosity. i'm using shell helix plus diesel 10w-40 with cf spec for about 2 years now and very satisfied naman ako. but this whiz oil is cheaper php240/ltr while the shell oil is php316/ltr. the whiz oil has the better spec because it already has a ci4 spec while the shell oil is cf only.

every 3000km nga pala ako mag-change oil so i will save more with this whiz oil.

what do you think guys? should i go for it?

here's a link of the said oil http://whizoil.com/products.php?grab...n=view_details