SAE 10W20 is standard oil, due to the weight I would recommend a heavier oil! When changing oil it is 235.0 ccm on each side. When dry it is 276.0 ccm +/- 2.50 ccm. I.e 2.76 dl. /2.5 dl. The level without the spring inserted, fully compressed, is 170.0 mm, +/- 2.0 mm