I have '96 Saab 900S (4cyl. non turbo) recently I got some Agip 10W-40 "Sybthetic Blend" $5 canadian/1L but the oil seems to have some foaming issues everytime I check the oil level when the engine is just warm 2-3km trip I see bubbles on the dipstick about the size of poppy seeds. I this normal? Because after harder driving and a much longer trip something like 30km(~20 miles) the oil does not seem to have bubbles in it. Should I dump the oil? o