Kroon Oil Classic Racing Oil 15W-50

Semi-synthetic 15W-50 oil for classic racing and high-output engines

Kroon-Oil Classic Racing Oil 15W-50 is a semi-synthetic engine oil combining synthetic and mineral base oils, developed for classic motorsport and powerful classic engines.

It is available in 1 L, 20 L and 60 L packs.

Key properties

• Grade: SAE 15W-50, semi-synthetic
• Listed: ACEA A3/B4, API SP/CF, MB 229.1, VW 501.01 / 505.00
• Viscosity: 127 mm²/s at 40 °C, 17.4 mm²/s at 100 °C, viscosity index 151
• HTHS 4.49 mPa.s, Noack 8.6%, cold viscosity 4,700 mPa.s at -20 °C
• Total base number 10.4 mg KOH/g, sulphated ash 1.32%
• Described as having strong detergent and dispersant action and stable oil pressure

Choosing the right oil

This is the oil in the Classic range for engines that work hard: event-prepared classics, and rebuilt engines of post-war sports cars with a lot of power. It is not an everyday-driver oil in the same sense as the mineral Multigrades; choose it when your use case is competition, track days or a high-output build.

Before you use it in a freshly rebuilt engine, check with your engine builder. A running-in oil, such as the Millers Classic Running In Oil, is normally recommended for the first period after a rebuild, and semi-synthetic oils are best kept for after that.

The 20 L and 60 L sizes make sense for race teams or clubs sharing the same spec across several cars.