About Mr. Efficiency

Here's My Story

I fix cars for a living and test efficiency projects at home — real tools, real bills, real trade-offs. Efficient Wins exists because most “save money” content is either too shallow or too salesy. Here you get calculators with transparent math and write-ups from actual installs and shop habits.

The goal is simple: know what something actually costs before you decide — a heat pump water heater, a suspension drop, an EV charger, or a cheap used tablet for fieldwork.

What Makes This Site Different

• Tools first. Mortgage, home energy, EV charging, aero savings, and everyday math — free calculators that update as you type.
• Shown work. Breakdowns, assumptions, and methodology so you can challenge the numbers.
• Honest defaults. Labeled as assumptions based on common U.S. rates — not magic answers for your house or car.
• No hype. If a mod or upgrade does not pay back, the math should say so.

Focus areas

Try the Calculators Browse Car Wins

Questions or guest pitches for the podcast: efficientwins@yahoo.com