Facing pressures from regulators, customers, and shareholders to act on climate, companies are considering alternative fuels like RPG. Early adopters of RPG may gain time to explore longer-term solutions and extract greater use from existing RPG-fueled equipment before investing in electric versions in the coming decades. Failing to accurately evaluate RPG and other lower-carbon fuels could result in misplaced investments (or lack thereof), trap companies with expensive or sub-optimal fuels, or even force an early jump to electrification before the market offers affordable equipment well-suited to companies' needs. This memo examines the key factors that will determine whether the market for RPG is likely to scale, particularly relative to other alternative fuel options and electrification as discussed in the primer.