eddie420

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mikesrx350

thank you eddie

Cwang

So the takehome is that I should use 0w20 fully synth regardless of climate? It's been 40 degrees this week (105 in Funny numbers) should I stay with the manufacturer's recommendation?

Knucklebus

Unless you are towing or racing, yes, 0w20 should be fine. There should be a temp range in the manual, which I don't have in hand at the moment, that should show the oil needed for expected temps. If the temp doesn't drop below 30°C ever at night and continues to be 40°C during the day, I'd maybe consider 5w30 but only for as long as the temp were that hot. As mentioned before, you can blend in a few qts of 5w30 with your normal 0w20 and come up with 2w24 if you really want to fine tune it. I run 0w20 year round and have -10°C all the way to 40°C here but not for extended periods of time and mine sits in a heated/cooled garage overnight.

ibidu1

iTrader: (1)

I own a 3GS with close to 180k miles, ive been doing 3k oil changes with conventional motor oil for a very long time. I was sharing what has worked for me, and my theory on it. Thankfully no issues with the car and the oil level is very close to where I filled it up. There are many guys on the 3GS (btw 3GS and 4GS use the same pistons and rings) section with a lot less miles that do have oil consumption issues that run synthetic and replace their oils at 5K. The majority of the cars that I see with issues run synthetic oils. I am not saying dino oil is better than synthetics, as far as lubricity and breakdown synthetic is better. If I owned a high hp or a turbo car I would use synthetic. I am against letting oil run past 3k miles, the reason is that oil gets dirtier over time.

If you remove the oil pan bolt on an engine that has ran fresh oil for 1 hour you will see the oil come out nice and golden, if you do the same after 1k it will get darker, and so on after that.