Classic Engine Oil FAQs

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10th June 2019
Using Synthetic Oils in Classic Cars

Can I use synthetic oil in my Classic Car?

We are often asked ‘Can I use synthetic oil in my Classic Car?’  The fear of using synthetic oils in your classic vehicles is a thing […]
19th October 2018
Using Synthetic Oils in Classic Cars

Using Synthetic Oils in Classic Cars

Using Synthetic Oils in Classic Cars The fear of using synthetic oils in your classic vehicles is a thing of the past – or at least […]
1st August 2018
How Can I Protect My Rebuilt Engine?

How Can I Protect My Rebuilt Engine?

How Can I Protect My Rebuilt Engine? is a question we are regularly asked.   Engine building needs to be done correctly with the right parts and […]
11th April 2013
Millers Classic Running-In Oil SAE 30

I have just rebuilt my engine, how do I run it in?

Millers make a special Classic Running In Oil, a mineral, SAE 30 oil, which should be used for the first 500 miles. After this, you should […]
11th April 2013
Millers CM2T 2 stroke mineral oil

Do you have a 2-stroke oil suitable for older 2-stroke engines?

Yes.  Traditionally, the most popular 2-stroke oil was an SAE 40 mineral oil.  However modern 2-strokes require a low smoke, semi synthetic 2-stroke oil with a […]
11th April 2013
Classic Mini Oil 20W50

Do you do a special oil for the original Mini and other applications where the engine and gearbox share the same oil?

Yes, Classic Mini Oil 20W50 (from our Classic Pistoneeze range).  This product is a moderate detergent, premium SAE 20W50 multigrade mineral engine and gear oil. It has been […]
11th April 2013
Millers Classic Sport 20W50 Semi Synthetic Engine Oil

Which engines would use Millers Classic Sport 20w50?

Millers Classic Sport 20w50 semi synthetic, multigrade, has a higher performance capability than the mineral version Millers Classic 20w50 multigrade engine oil.  Being a semi-synthetic, it has been developed […]
11th April 2013
Millers Classic 20W50 Mineral Engine Oil

Which engines would use Millers Classic Pistoneeze 20w50?

Millers Classic Pistoneeze 20w50 (previously called Millers Classic 20W50) is a moderate detergent, premium, mineral multigrade and is typical of the viscosity of oil specified for the  […]
11th April 2013
Millers Classic Pistoneeze P30 oil with low treat detergent

Is it possible to use a more modern type of oil in these very old engines?

Not at all. Modern engines are designed to run on an oil with very low viscosity (thin), such as 0W and 5W. These are too weak […]
11th April 2013
Which oil should I use in my vintage car or bike engine?

Which oil should I use in my vintage car or bike engine?

Vintage cars/bikes, ie. pre-WW2, had very primitive oil filtration systems and used non-detergent oils, such as our Millerol range. The Millerol range contains anti-wear and anti-corrosion […]
11th April 2013
Millers Classic 20W50 Mineral Engine Oil

Are modern engine oils suitable for older vehicles?

Are modern engine oils suitable for older vehicles?  No.  Modern engines are designed to run on very low viscosity (thin) oils, such as 0W and 5w […]
11th April 2013
Millers CFS 10W50 Fully Synthetic Engine Oil

What are the specific characteristics and advantages of synthetic oils?

Here we try to summarise what are the specific characteristics and advantages of synthetic oils? As with mineral oils, there are differing levels of quality within […]
11th April 2013
What is the difference between a mineral and synthetic oil?

What is the difference between a mineral and synthetic oil?

Both types begin with crude oil.  Mineral oil is obtained directly from the refining process, whereas synthetic oils are subjected to chemical processing which alters and […]
11th April 2013
Millers Classic 20W50 Mineral Engine Oil

What is meant by multigrade?

Multigrade oils were developed in the 1960’s and have many different formats (20W50, 20W60 etc.).  Prior to this, all oils were monogrades (ie. 30, 40, 50). […]
11th April 2013
Millers Classic Millerol M30 monograde oil without detergents

What does the “viscosity” of an oil mean?

Viscosity is a measure of the thickness of an oil.  The viscosity (thickness) of the oil at low and high temperatures is measured on a scale […]