In advising people new to the industry, I always make it a point to reinforce the notion that the make and model of a machine does not make a market, people do.
So, if the goal is to increase the profitability of your self-service wash, you should test your decisions against three questions.
Will the proposed change increase the amount of money coming into the business (throughput), reduce the amount of money that cannot be used (investment) or reduce the amount of money going out of the business (expenses)?
A decision that results in more money coming in, less investment or less money going out will generally be a good decision for your business.
In a subsequent thread, you also mentioned a goal of defending your turf from the number of express exterior washes that are popping up.
Experience has shown this is a legitimate concern for many self-service owners, especially those with in-bay automatic car wash systems.
For the time being, forget DIY versus DIFM and compare the value propositions.
Express Exterior
Convenience – fast process speed, typically 3 to 4 minutes, and virtually no waiting in line
Image – attended by people in uniforms, usually a manager on site
Value – low price for base wash, high quality clean/shine/dry, free use of vacuums
Self-Service – In-Bay Automatic
Convenience – typically slow, about 5 minutes, and waiting time can be exceedingly long during busy periods
Image – usually unattended or part-time housekeeper
Value – throughput capacity limits ability to price low, acceptable clean/shine/dry, pay to use vacuums
When you consider that most express washes offer an array of value-added services including undercarriage rust inhibitor, total body protection and tire shine, many use nationally branded products, most spend over $12,000 a year on advertising and virtually all offer customers
loyalty rewards and re-wash policy, you end up with a formidable competitor regardless of how a market may be segmented.
Consequently, you may want to consider how your propose decision(s) will bring your value proposition for automatic carwash more in line with express.