And to just add a few more points.

Just wanted to show how the Timken test is actually done. Here's a couple of vids of a product call ZDDP MAXX TREATS 5 QUARTS OF OIL AT OVER 1800 PPM PHOSPHORS AND 2500 PPM ZINC. It's not magic just Zinc and Phosporus you really don't need 2500ppm zinc and if you have a 3 stage cat on a newer vehicle you don't want that much because your converters life will be shortened by about 25%. In a gas engine 1100ppm to 1200ppm is what you want. But you will get the point with the videos.


Timken test of Exxon 5w30 conventional oil no additives.MOD - YouTube


with added ZZDP and Phos.

Timken test of Exxon 5w30 conventional oil with ZDDP MAXX oil aditive.MOD - YouTube


But with the availability of oils with the CI-4/SL ratings in the Philippines you don't need it. This is just to show the differnce between oils with less than 900ppm zinc vs ones with over 1200ppm. SM oils can have as low as 650ppm zinc (yikes). If you have a classic muscle car you'll wreck your engine with modern oil due to there flat flat tapper lifters. If you vehicle is older than 1996 without roller lifters newer oils like SM,SL, SN will wreck flat tapper lifters and cams.

Engines with flat-tappet cams have extremely high pressure loading at the contact point between the lifter crown and the cam lobe. Even stock passenger cars can see pressure in excess of 200,000 psi at the point of flat-tappet/camlobe contact." To prevent excess wear, traditional motor oil included generous dose of antiwear additives, primarily zinc dialkyldithiophosphate (ZDDP). "The chemistry is such that the additive is a combination of zinc and phosphorous this has been loss due to new the newer API rated oils especially in larger countries. But regulations have killed this off with the new SM, SL, oils.

Basically if your vehicle or equipment such as farm equiempent or generator set does not have roller lifters and your using SM/SL/SN your not getting the proper protection. You need u need at least CH-4/SL or CI-4/SL or full fledged diesel oil.

API rating is more important than brand name or synthetic, Semi synthetic vs Dino. Most CH-4/SL or CI-4/SL Dino oils will give more protection than a Full synthetic SM oil.