Richland, Washington-based lubricants, fuels and propane distributor Christensen Inc. acquired Yorkston Oil Co., a lubricant and fuel distributor and Commercial Fueling Network cardlock marketer in Bellingham serving customers in northwestern Washington state.  OQ Chemicals on Dec. 6 said it raised prices on neopentyl glycol – a polyalcohol used in manufacturing synthetic lubricants – in the United States by 20 cents per pound for slurry and 22 cents/lb for molten or flakes.