Shell Company of Thailand was Thailand’s largest lubricants supplier in July for a second month as it boosted its market share of heavy-duty engine oils (HDEO) and industrial oils.Its share of Thailand’s lube sales in July rose to more than 37pc of the total volume, government data showed. The share was up from less than 33pc the previous month and the highest this year..The trend reflected a rise in its share of Thailand’s HDEO sales to more than 36pc of total demand. The share was up from less than 31pc in June.Thailand’s lube consumption rose by 11pc in July from year-earlier levels to 48,480 kilolitres (42,900t). Demand rose for a fifth straight month amid a strong revival in the country’s economic and industrial growth..Thailand's July lube demand holds firm.Lube consumption fell by 20pc from June amid a typical slowdown in demand during the monsoon season.Consumption of HDEO fell by a larger 28pc in July from the previous month to 11,510kl. The slowdown far outpaced the 11pc drop in Shell’s HDEO sales from June.PTT Oil and Retail remained Thailand’s second-largest lubricants supplier in July. Its market share of less than 27pc fell only slightly from the previous month.Like Shell, the fuel retail and distribution unit of state-owned PTT boosted its share of HDEO sales, as well as passenger car engine oils. But the size of the increase was smaller.Its relatively steady share of lube sales meant PTT and Shell’s combined market share rose to more than 64pc of total sales. The two companies typically accounted for around 58pc of total sales in the first half of this year.Their rising share was at the expense of distributors and blenders that already had a much smaller market share.PSP Specialties remained Thailand’s third-largest lube supplier in July. Its market share fell to less than 13.5pc of the total, from more than 15pc in June.Domestic refiner Bangchak remained the fourth-largest supplier. Its market share shrank to less than 8.5pc of total sales, from close to 10pc in June..Shell Thailand’s largest lube supplier in June