Is it a good idea to move from Synthetic oil to normal oil ?

[tmontague]

5w30 should be fine, but there is no way of really knowing if you exceed factory specs without knowing oil temp and/or pressure. None of which is available without an aftermarket gauge.

The only way going to a heavier weight oil makes sense is if you are operating above 212F oil temps, or if you want to reduce oil consumption and you notice it helps. You could try a 10w30 as they are slightly thicker than a 5w30 and potentially may reduce oil consumption. The difference between a 5w30 and a 10w30 isn't very big however as they both have to fall into the same viscosity spectrum at 100C. Most 10w30's are a big thicker at 150C due to a higher HTHS rating but like I said, it may not be noticeable enough for consumption issues.

[ojeysky]

Originally Posted by tmontague

5w30 should be fine, but there is no way of really knowing if you exceed factory specs without knowing oil temp and/or pressure. None of which is available without an aftermarket gauge.

The only way going to a heavier weight oil makes sense is if you are operating above 212F oil temps, or if you want to reduce oil consumption and you notice it helps. You could try a 10w30 as they are slightly thicker than a 5w30 and potentially may reduce oil consumption. The difference between a 5w30 and a 10w30 isn't very big however as they both have to fall into the same viscosity spectrum at 100C. Most 10w30's are a big thicker at 150C due to a higher HTHS rating but like I said, it may not be noticeable enough for consumption issues.

My oil will be due for a change in 2 weeks after adding the last litre of synthetic. I have tried looking for a conventional 5w30 or 10w30 with no luck. Am wondering if a semi-synthetic of 5w30 will not burn. Any thought?

[IllusionX]

Originally Posted by ojeysky

My oil will be due for a change in 2 weeks after adding the last litre of synthetic. I have tried looking for a conventional 5w30 or 10w30 with no luck. Am wondering if a semi-synthetic of 5w30 will not burn. Any thought?

What does the engine refill cap say?

Typically, oil weight tend to be quite heavy in tropical countries..

What oil is available in your country?

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[ojeysky]

Originally Posted by IllusionX

What does the engine refill cap say?

Typically, oil weight tend to be quite heavy in tropical countries..

What oil is available in your country?

Sent from my CLT-L04 using Tapatalk

5w30, 0w20, 0w40 all synthetic and semi-syn
Then we have 20w50 conventional, am told using this causes sludge and reduces engine performance. It's 5w30 on the engine cap and the car is USA spec

[B.B._07]

Originally Posted by ojeysky

My oil will be due for a change in 2 weeks after adding the last litre of synthetic. I have tried looking for a conventional 5w30 or 10w30 with no luck. Am wondering if a semi-synthetic of 5w30 will not burn. Any thought?

Short answer is no, oil burning is a symptom of engine wear (most likely worn piston rings). You can try to minimize the running by running a thick oil like 20w50 but the downside in somewhat lower fuel economy. Maybe look for a non synthetic 15W40 or 10W40.