Quote Originally Posted by Lin Dan View Post
Very true.

When I was still driving my preowned '89 Daihatsu Feroza, "kumakain na ng langis" as the old saying goes especially during long trips. Back then, the classic Castrol GTX 20w-50 motor oil was a standard for petrol engines. So this was my motor oil then.

For a typical summer trip to Baguio (Holy week), Makati to Pozorrubio (stop over with coffee break), 600ml na ang kinain na langis. So I do the normal "top up". Upon reaching Baguio proper via Kennon Road, another 200ml ang nabawas. That's almost 1 liter, one way pa lang. Going back to Manila is a different story. 500ml na lang ang kinain upon reaching Makati.

One day I tried Pennzoil 10w-30 (just a conventional) motor oil. Another yearly Holy Week trip to Baguio with the same stop-over at Pozorrubio, 1 liter na ang kinain na langis! Hindi pa ako nakakaakyat niyan ng Kennon Road. So to cut the long story, using a "thinner" motor oil (i.e. 10w-30) made my "old" engine consume more oil than the conventional "thicker" 20w-50. When I went back to 20w-50, yun oil consumption was less.

These are just my observations (based on my story above) on the issue of using thinner oils like 10w-30 on older engines:

1) More oil consumption during long trips under hot ambient temperature and high altitude driving = higher engine revs.

2) BETTER cold starts

3) No effect on fuel consumption.

Again, these are just my observations.
yung 2002 model altis ko kumakain na din ng langis eh.. after 2,500 kms of city drive nasa 1 liter ang nauubos nya.. hindi naman mausok or nag lalangis sa tail pipe.. mag 180,000 kilometer na din ang odometer reading..