we tried pertua belore.
decades ago, perhaps even before some threaders here, were born.
"we simply... lost interest."
Same observation with my Santa Fe. Looks like di tumatagal Ceratec ng 50,000kms. After 55.000kms since last application ko ng Ceratec nag lagay na ko again with Shell R4X. Malaki tinahimik ng engine so baka sa katagalan nasanay na ko sa sound na deminishing effect ng Ceratec. Sa susunod try ko naman yung MOs2 additive nila.
its a viscosity thickener... it will make your engines quieter
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dito ako tumingi about pertua nndto na lht ng info about PERTUA. check the link.
Pertua Oil & Metal Treatment | Engine Oils | Industrial Oils
Pertua user here for me ok na ok performance nya naobserve ko quiet engine even on high revs, more pick up,smoother engine,does not need high revs to gain speed.☝☝☝