I was of the assumption that 5w40 is just as thin as 5w30 when cold so it would get to intended parts just as quick....
From 5w30 to 5w40.
- Thread starter paulos44
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The first number is its viscosity when cold the second is its viscosity when hot, there's more to it than that though it's all on opie oils iirc.
Anyone read this article ? Im tempted to try some.
http://www.fastcar.co.uk/2012/08/28/millers-nanodrive-test/
http://www.fastcar.co.uk/2012/08/28/millers-nanodrive-test/
From what's been said by a member that's used it in his car on another forum, they only got 5k on a N/A 5 series before it started to break down, I wouldn't know what the recommended changes would be on a 1.8t though.
Agree here - my 05 20vt FR is now on 153k still using 5w 30 and not using any oil between services. Not driven slowly either..
I sometimes wonder whether I am wasting money changing every 5000 miles......
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Sent from my XT1039 using Tapatalk
Because that seemed to be the general consensus on here when I got the car 2 years ago....5w30 with the VW 504/507 spec....
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Sent from my XT1039 using Tapatalk
Some general oil info from millers oils www.millersoils.co.uk/
What does the 'viscosity' of an oil mean?
Viscosity is a measure of the thickness of the oil. The viscosity of oil at low and high temperatures is measured on a scale determined by the Society of Automotive Engineers and given a number known as the SAE number. Therefore SAE 30 oil will be thinner than SAE 40.
What is a multigrade oil?
Before the 1960s, all oils were monograde. Multigrade oils were developed have a designation in the format 20w50. Mulitgrade oil was made possible by the use of polymers, that expand as they get hotter. Therefore a multigrade oil can have the viscosity of an SAE20 when it is cold and the viscosity of an SAE50 when hot. This removes the necessity to change from thin oil in the winter to thicker oil in the summer, and maintains the best protection for the engine over a wide range of running temperatures. The 20w number is the cold viscosity and the 50 number is the viscosity at 100°C.
What is the difference between mineral oil and fully synthetic oil?
Both types are made from crude oil. Mineral oil is obtained directly from the refining process, whereas synthetic oils are altered by chemical processing which improves its chemical structure. Synthetic oils have better performance than mineral oils at all temperatures, and are more durable. They are more expensive but are higher quality, offer higher performance and longer life.
What are the specific characteristics and advantages of synthetic oils?
The advantages of synthetic oils are:
• Better flow at low temperatures enabling thinner oils to be manufactured. Thinner oils are required by modern engine designers to help reduce fuel consumption and emissions.
• Higher film strength which gives better protection thereby reducing wear.
• More stable and less volatile at high temperatures, reducing oil consumption.
The interesting 'Race Technology Magazine – Synthetic Oil' article explains the advantages in more detail
What is a semi synthetic oil?
As the name suggests, a semi synthetic is a blend of mineral and synthetic base oils. The performance, price, quality and durability is between that of a mineral oil and fully synthetic oil. Lower quality semi synthetic oils have very little fully synthetic content and will not last as well as good quality examples.
What does the 'viscosity' of an oil mean?
Viscosity is a measure of the thickness of the oil. The viscosity of oil at low and high temperatures is measured on a scale determined by the Society of Automotive Engineers and given a number known as the SAE number. Therefore SAE 30 oil will be thinner than SAE 40.
What is a multigrade oil?
Before the 1960s, all oils were monograde. Multigrade oils were developed have a designation in the format 20w50. Mulitgrade oil was made possible by the use of polymers, that expand as they get hotter. Therefore a multigrade oil can have the viscosity of an SAE20 when it is cold and the viscosity of an SAE50 when hot. This removes the necessity to change from thin oil in the winter to thicker oil in the summer, and maintains the best protection for the engine over a wide range of running temperatures. The 20w number is the cold viscosity and the 50 number is the viscosity at 100°C.
What is the difference between mineral oil and fully synthetic oil?
Both types are made from crude oil. Mineral oil is obtained directly from the refining process, whereas synthetic oils are altered by chemical processing which improves its chemical structure. Synthetic oils have better performance than mineral oils at all temperatures, and are more durable. They are more expensive but are higher quality, offer higher performance and longer life.
What are the specific characteristics and advantages of synthetic oils?
The advantages of synthetic oils are:
• Better flow at low temperatures enabling thinner oils to be manufactured. Thinner oils are required by modern engine designers to help reduce fuel consumption and emissions.
• Higher film strength which gives better protection thereby reducing wear.
• More stable and less volatile at high temperatures, reducing oil consumption.
The interesting 'Race Technology Magazine – Synthetic Oil' article explains the advantages in more detail
What is a semi synthetic oil?
As the name suggests, a semi synthetic is a blend of mineral and synthetic base oils. The performance, price, quality and durability is between that of a mineral oil and fully synthetic oil. Lower quality semi synthetic oils have very little fully synthetic content and will not last as well as good quality examples.
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When I bought Quantum Platinum from TPS it was 5W-40, when I asked if this was the correct oil for the PD diesel he said it was what they use all the time 
Good enough for me
Good enough for me
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