R4000 RS Synthetic Plus with Ester (regular use) IPONE R4000 RS is a high-quality, semi-synthetic plus, ester-based lubricant for 4-stroke motorcycles, designed for regular use. IPONE has selected the best synthetic bases and additives to guarantee optimum protection for your engine and exceptional resistance to shearing. Semi synthetic plus with ester Available in 10W40 / 10W50 / 15W50 / 20W50 Made in France Fits: BMW G310GS 2018-2021 KTM RC 390 2017-2022