MSAR is a direct substitute for conventional heavy fuel oil (HFO) for use in diesel engines, power generation and steam raising. Chemring ( LON:CHG ) also was among the most talked about companies in London after seeing its share price drop 11 percent to 368.5 pence this morning amid speculation that Carlyle Group could cancel its plans to buy the defence and aerospace group. On Friday, Chemring revealed that it had received a "highly preliminary expression of interest" from Carlyle, driving its share up more than 25 percent.