Nakon jako puno sati provedenih proucavajuci ulja za aute /motore mogu samo reci da je najveca razlika u etiketi kada je rijec o polusintetici (10w-40 ili 15w40...)... Da budemo jasni razlika ima ,ali isto tako razlike od ulja do ulja za istu namjenu su toliko velike da odgovaraju onima od druge namjene. Prava razlika je dali je ulje mineralno ,sinteticko ili polusintetika!
Mineralna ulja za auto i motor su ista i dolaze u vecini slucajeva kao ulje u novim motorima (neda mi se objasnjavati zasto)
Polusintetika ulja za svakodnevno i koristenje u normalnim radnim uvjetima - razlika izmedju ulja zanemariva.
Full sintetika i racing ulja - velika razlika i nikako ne mjesati ,jer takva ulja u autima imaju kemiski spoj koji uzrokuje proklizivanje kvacila na motoru... znaci samo kod motora sa suhim kvacilom bi se mogla koristiti.
Motorna ulja su u pravilu nesto rijedja i zbog toga je moguce dobiti par ks na mjerenjima ili u trkama ,ali to ima i negativnu stanu! Takva ulja u stvari slabije podmazuju masinu i uzrokuju brze trosenje dijelova.
Znaci odluka o izboru ulja treba ovisiti o namjeni i cilju koristenja motra ili auta. Najbitnije je sipati propisanu gradaciju i redovito mjenjati ulje ,jer ulje gubi svojstva tijekom uporabe!
evo kratak c/p jednog primjera :
Are there any "real world" examples of long motorcycle engine life using automotive oils? There is a good one in the June 1996 issue of Sport Rider magazine in a report called the "100,000 mile Honda CBR900RR." The owner used conventional Castrol GTX oil, 10W40 in the winter, 20W50 in the summer. He changed it every 4,000 miles, changing the filter every OTHER oil change. No valve clearance adjustments were required after the initial one at 16,000 miles. And a dyno test against the same model with only 6,722 miles showed torque and horsepower virtually identical. The 100,000 mile bike was even used for some racing. In a subsequent follow-up, the same CBR had passed 200,000 miles and was still going strong! Plus, many motorcyclists have emailed me with their very positive results using nothing but automotive oils for years in a variety of rides. Oils have changed over the past 10 years, but that just means we need to be more careful in our choices.
