Ford Motor Co., Honda Motor Co. and Nissan Motor Co. added rebates and discounts to attract buyers over the Memorial Day holiday weekend, driving what may be the longest streak of sales increases in almost 10 years, reported Bloomberg News.

Industrywide deliveries probably reached a seasonally adjusted annual rate of 11.2 million light vehicles in May, according to the average of eight analysts’ estimates compiled by Bloomberg. If sales did exceed the 9.9 million rate from a year earlier, it would mean eight straight months of increases for the first time since a stretch that ended in June 2000, according to Bloomberg Data.

Sales during the Memorial Day weekend in the past three years ran about 40 percent higher than the typical May weekend, and sales on the last day of the month were more than double the average day, according to researcher Edmunds.com.

“This weekend’s activity aligns with the start of the big summer selling season,” said Jim Sanfilippo, chief operating officer of Innocean Worldwide Americas LLC, Hyundai Motor Co.’s in-house advertising agency.

Higher discounts may have been needed to help offset the weak retail environment, said Jeff Schuster, executive director of J.D. Power & Associates in Troy, Michigan. Sales to rental- car companies and discounted fleet purchasers may have also boosted results, scheduled to be announced tomorrow, he said.

Ford added $500 rebates May 27 on the namesake brand’s Focus car, Edge sport-utility vehicle and F-150 pickup, said Robert Parker, a spokesman. The discounts also applied to the automaker’s Lincoln MKS and MKZ sedans and MKT and MKX sport- utilities.

Nissan added a $500 discount for most of its namesake brand vehicles from May 28 through yesterday. Honda’s luxury Acura brand is offering lease deals on all models with no down payment and no security deposit, said Chris Martin, a spokesman. The offer started May 28 and runs through July 6.

The annualized rate of sales in the month may match the 11.2 million pace in April, according to Autodata Corp. in Woodcliff Lake, New Jersey.

Ford’s sales in the month may have gained 10 percent or more, and the industry rate could be in the low 11 million vehicle range, Mark Fields, the company’s president of the Americas, said May 24. The Memorial Day weekend would have an “outsized impact” on May’s total, Fields said.

Ford’s May sales probably rose 16 percent from a year earlier, according to analysts surveyed by Bloomberg. The company’s market share should continue to grow if it performs as expected, Fields said.

Honda’s U.S. sales may have increased 22 percent from last May, according to Edmunds.com, which predicted an 11 percent gain by Nissan and 28 percent growth for Hyundai.