How come some dealers don't use the correct oil?

[abimanyu]

When you by a brand new car, shouldn't you use the thinnest oil recommended? For example, for corolla is 5w30. Then how come the local dealer uses shell 10w40,which isn't even recommended in the manual.

[Flashmn]

because of its temperature range.

[REN69]

Exactly.. Indonesia is a HOT country all year round, so the thicker the oil the more protected the motor is. Where as in Canada where we get temps from 30C+ in the summer to -30C and lower in the winter it makes more sense to have 5W30.

[abimanyu]

but I've been using IGOL Process Full Synthetic 5w30 since 15000 KM, is it ok? But 10w40 isn't in the manual, 10w30 is.

[Flashmn]

I'd use soemthing like 10W40 or 5W50 or something along those lines. something w30 is way too thin for indonesia.

[abimanyu]

I just changed my oil and I love the IGOL Process Compact 5w30. How about Igol Symbol Ceramic 5w40?

[Flashmn]

Like I said, its kinda thin for indonesian climate.

[Cavi Mike]

Synthetics don't change due to temperature like conventional organic oils. Your 5w30 should be fine. If they're replacing your synthetic with conventional oil, then you'll need something heavier like 10w40 to compensate for the high temperatures.

[abimanyu]

That's what I thought, and the IGOL Process Compact 5w30 is such a great oil, well everything from IGOL I think is great. Thanks again. Will stick to Igol or Redline.

I change oil at a local oil shop, and get a free oil change.

[Flashmn]

Synthetics don't change due to temperature like conventional organic oils. Your 5w30 should be fine.

Nope, but if its as runny as water, it wont do much good for the bearings on the bottom end, camshafts and over all lubrication will be bad. I wouldnt go 5W30 if I was in indonesia. I used like 20W50 oils in my rolla in the philippines, because its +30C every frigging day.

[cashcrazy]

I live in a hot climate and I still use the 5w-30 that meets the manufactures requirements. Thicker isnt always better. With some of the tight tolerances Toyota uses in their bearings the thick oil can not properly lubricate, causing pre-mature wear.

[foompla]

really? i thought they used it because it was cheaper.

[Flashmn]

Yup really, TX is at a higher latitude than indonesia and philippines. So its also slightly cooler there. Now talking about tolerances, well its not exactly like that, toyotas tolerances arent any higher than lets say mercedes, etc. Thing is, that the oil needs some tension to work in the bearings, if the oil is too thin, the surfaces have less tension and thus the bearing can rub. Thats why the oil has certain temperature ranges, if it goes beyond that, well it will be like water and it doesnt help much in bearing surfaces.