XFS 5w50 A fully synthetic, high performance engine oil for petrol engines requiring higher levels of protection under prolonged high temperature conditions including warmer climates. Ref: XFS 5w50 A fully synthetic, high performance engine oil for petrol engines requiring higher levels of protection under prolonged high temperature conditions including warmer climates. Price: £29.41 (Including VAT at 17.5%) Size 1-litre (£8.07) 5-litre (£25.03) Specification API SL ACEA A3, B3 VAG 502.00/505.00 5w50 in mandatory for Ford Cosworth cars Quantity: