Using 5w20 fully synthetic engine oil on a Nubira2 1599cc ?

glyuen · Post by **glyuen** » Thu Dec 01, 2005 6:58 pm

Hi,

any one tried using 5w20 engine oils under gentle driving condition and short trips. The manual calls for 5w30 and 10w30 rated oil..

the temp here is around 26-34 degress celsius..

thanks in advance

Daniel · Post by **Daniel** » Thu Dec 01, 2005 7:17 pm

Hi,

Why do you want to use other viscosities than those recommended?

From service manual:
"Engine Oil Viscosity

Engine oil viscosity (thickness) has an effect on fuel economy and cold weather operation. Lower viscosity engine oils can provide better fuel economy and cold weather performance; however, higher temperature weather conditions require higher viscosity engine oils for satisfactory lubrication. Using oils of any viscosity other than those viscosities recommended could result in engine damage."

I stick to 5W30.

Daniel

Daew0Leganza · Post by **Daew0Leganza** » Fri Dec 02, 2005 4:49 am

my setups Castrol Synthetic 5W-30 Proline Lucas Oil Stabilizer Engine Restorer

genie47 · Post by **genie47** » Fri Dec 02, 2005 8:23 am

I would stick to 5W30 as the lowest but in tropical heat, yes, glyuen, its me, 10W30 will be better because they have lower VII so the oil holds its grade longer. No harm using 5W30 but don't go speeding up Malaysia with it.

genie47 · Post by **genie47** » Sat Dec 03, 2005 3:22 pm

Motor oils are measured by their viscosity whether they are synthetic or not.

Check this viscosity chart out. If they spec it as a 30wt oil, it will fall within the stipulated viscosity range.

http://www.bobistheoilguy.com/visc.html

genie47 · Post by **genie47** » Wed Dec 07, 2005 2:45 am

Synthetics only offer high temperature performance. What matters in engine oil is not the basestock alone but also the additives that make up the rest of it. It is these that actually prevent engine wear.

If you are using your car on the drag strip, then synthetics are better for you because your car will experience higher temperatures than most of our street going ones. This resistance to temperature prevents sludging. You don't want to see "coffee grounds" when you drain the sump. That is the only "performance" synthetic oil will give you.

glyuen · Post by **glyuen** » Tue Mar 07, 2006 3:28 am

Hi Genie. Din see your reply. Just changed my oil from Schaeffers 9000 to M1 5w30. The engine feels rough and there is slight drop in fuel economy. Any idea for this occurence?

Erm what speeds or rpm can 5w30 take? Constant 130-140 on Malaysia highways fine?

genie47 · Post by **genie47** » Tue Mar 07, 2006 2:23 pm

Mine suffered a slight drop also but will be restored later on after 3-4k. I took the same hit too when I used the Citgo but by the second fill, it was at maximum efficiency. The 5W30 should be able to take it.

cpd · Post by **cpd** » Wed Mar 08, 2006 6:37 am

glyuen wrote:Hi Genie. Din see your reply. Just changed my oil from Schaeffers 9000 to M1 5w30. The engine feels rough and there is slight drop in fuel economy. Any idea for this occurence?

Erm what speeds or rpm can 5w30 take? Constant 130-140 on Malaysia highways fine?

Glyuen, I'm in Australia, I'm using Castrol Magnatec 10w40, and it's purring like a kitten. Takes on doing 120, 130 on freeways. I'd go for something with a higher top-end number; if you really need the lowdown 5, then get 5w40 if you can; keep in mind, the lower the first number, the more expensive.

10w40 Magnatec is like $30AUD per 5L, but for instance, 5w40 is something like $45, if you can get it.

panther · Post by **panther** » Wed Mar 08, 2006 11:28 am

In the UK I'm using BP Visco 7000 fully synthetic 0w - 40. It starts from cold much smoother & quieter than when it had 10w 40 oil.

asam · Post by **asam** » Sat Mar 11, 2006 7:57 pm

Red Line 10W-30..........enough said