In the era of fast food, bank card machines, gas-and-go and instant millionaires, we have Jiffy Lube, where they change your oil in 10 minutes -- no appointment needed.

For about $21 a car, Jiffy Lube offers a 14-point maintenance program that includes an oil change, oil filter replacement, chassis lubrication, and check of fluid levels for the transmission, brakes and power steering.

Drive in, drive out. Fast and quick.

Little wonder that Jibby Lube Chairman Jim Hindman, 50, is fond of calling his company "the McDonald's of the car-service industry."

Speed is as speed does.

In seven years, Hindman built the seven Jiffy Lube franchises he acquired in 1979 into a chain of 348 service centers in 33 states. The franchises are concentrated in Maryland, Pennsylvania, Illinois and California. As of March 31, there were another 152 Jiffy Lube centers coming on line.

In January, Jiffy Lube made a $110 million deal with Pennzoil Co. under which they would build 325 new Jiffy Lube stations. Naturally, both the new and the old service centers will use Pennzoil motor oil.

Having gone this far, the Jiffy Lube folks, who are based in Baltimore, are going public. Shearson Lehman Brothers and Alex. Brown & Sons are the underwriters.

Jiffy Lube is offering investors 2.030 million shares at between $10 and $12 a share. At, say, $11 a share, the company would raise an estimated $19.8 million, before expenses, from the sale of 1.8 million shares.

The company says the money will be used to pay debts and build more Jiffy Lube service centers.

The other 230,000 shares, to be sold by current stockholders, will raise $2.53 million. Of that, $1.1 million will go to Hindman, a former football coach at Western Maryland College. Hindman will sell 100,000 shares, leaving him with about 1.8 million shares, or about 29.7 percent of the company's stock. That's enough for him to retain solid control of Jiffy Lube.

Previous investors, who paid an average of $2.89 a share, will retain two-thirds of the company while new investors will get the rest at the $10-to-$12 price range.

Even so, the offering is attracting considerable interest in the investment community.

The rapid growth of the Jiffy Lube system boosted revenue to $29.4 million in fiscal 1986, ended March 31. That was a 103 percent increase over 1985. And 1985 was a 140 percent boost over 1984. Profits saw similar growth in those years. Jiffy Lube's fiscal 1986 profit was $1.2 million, or 33 cents a share.

That would bring the stock to market with a price-earnings ratio of about 33, or about twice the multiple of the Standard & Poor's 500.

The blazing pace of Jiffy Lube earnings is not likely to continue. Jiffy Lube's prospectus notes that in the past three years, the company experienced substantial income growth from development fees and from gains on the sale of real estate and from company-operated centers. Those gains were fine while they lasted, but in the future, the prospectus adds, "the company's profitability will depend upon growth in income from franchise royalties, sales of automotive products and rental income, none of which can be assured."

With that disclaimer on the record, the company points out that oil-change centers such as Jiffy Lube accounted for only 2 percent of retail motor-oil sales in 1982 and for 4 percent in 1985, leaving much room for growth.

"The company believes that fast oil-change centers fill a market niche created by the decline in the number of full-service gas stations," the prospectus notes. "The extent to which fast oil-change centers can capture an increased share of the oil-change market depends on a number of uncertain factors, including an increase in the number of centers throughout the major metropolitan markets, a greater public awareness of the fast oil-change industry and the successful marketing of services to owners of fleets of cars and light trucks."

Analyst Guy W. Ford of the Investment Corp. of Virginia in Norfolk thinks that investors should avoid Best Products at this time. Best is remodeling its stores, but earnings will be flat in 1986, he says.

"With the many tactical and strategic questions still surrounding Best, the risk-reward ratio remains unfavorable," he writes. "Consequently, we retain our opinion that investment dollars, particularly for retail stocks, are better invested elsewhere."

Ford notes that last December, Best was trading at $14.50 when the Dow Jones industrial average was at 1497 points. Now the Dow is in the 1800s but Best still is selling at about the same price. He said he thinks Best will maintain its $12-to-$17 trading range for the next 12 months.

"In sum," he concludes, "performance-oriented investors should continue to look elsewhere."

Shareholders in CACI Inc., an Arlington professional services firm, will be asked to decide soon whether to swap their Class A shares, which will have one vote per share, for Class B stock, which is worth 10 votes per share. Class A shareholders will elect only two directors out of a total of seven.

But those who keep their Class A shares will get a 30 percent stock dividend -- 30 shares for every 100 they own -- and a 10 percent larger dividend than Class B shareholders, if and when dividends are ever paid.

However, the key attraction is that Class A shares will be publicly traded over-the-counter while the Class B shares will not.

Why the change? Two reasons, said Charles P. Revoile, CACI's senior vice president and general counsel. One was the desire to get rid of a system in which CACI shareholders held "paired-shares" in both the Arlington company and CACI N.V., a European subsidiary. The system required a substantial amount of double paperwork.

The second goal was to assure the present management that it will be able to retain control of the company in the face of any future takeover efforts. Management holds about 30 percent of the votes. While investors are likely to hold onto their Class A shares, the managers are expected to convert enough of their A shares to B shares that they wind up with about 60 percent control of CACI.

Herbert W. Karr, chairman of the board, is the largest stockholder. He holds 22.1 percent of the company's voting power. After the exchange of shares and distribution, that would rise to 54.1 percent

ERC International of Vienna, a professional services firm, has moved to the New York Stock Exchange from the American Stock Exchange. ERC International serves government and industry. . . . James River Corp. of Richmond will become a listed stock option on the Big Board this summer. That will give the NYSE a total of 12 stock options. . . . Starting today, MIW Investors of Washington will begin operating under its new name, Ameribanc Investors Group. MIW is the holding company for First American Savings, which is changing its name to Ameribanc Savings. MIW's trading symbols will be changed to AINVS for common shares and AINVP for preferred stock.

Williams Industries of Falls Church invited bankers and brokers last week to tour its new $1.5 million bridge girder fabrication plant in Manassas, Va. Williams Industries, a $50 million construction company with multiple subsidiaries, hopes to do $12 million in bridge girder work in its first year. Bridge and highway work is picking up as money raised from the gas tax begins flowing through the states to contractors.

Figgie International Holdings Inc. of Richmond has bought back another 328,550 shares of its Class B common stock for $18.3 million in an effort to protect the company from hostile takeover attempts. Reducing the number of Class B shares, the company said, would increase the voting power of management, including its head, Harry E. Figgie Jr., his family and affiliates. Class B stock carries one vote per share while Class A stock has one-twentieth vote per share. Figgie is an $803 million company with 35 divisions involved in consumer, industrial and technical services.