Samantha Reed

After putting 8 of the best small engine oils through their paces on real lawn mowers, snow blowers, and chainsaws, our team landed on three standouts for : Husqvarna XP+ 2-Stroke Oil as the cleanest-burning two-cycle, STP Premium Synthetic Blend 10W-30 as the best-value four-cycle for everyday push and riding mowers, and Valvoline Daily Protection … Read more

Break-in oil is a specially formulated motor oil with high zinc dialkyl dithiophosphate (ZDDP), low detergent, and zero friction modifiers. You use it for the first 30 minutes to 1,000 miles of a freshly built, rebuilt, or newly camshaft-equipped engine to seat piston rings against the cylinder walls while protecting flat tappet camshafts from premature … Read more

Pulling into the staging lanes at our local drag strip last season, my friend Greg killed a fresh flat-tappet cam after a single weekend because he ran a modern API SP oil. The zinc was almost gone. That moment sent our entire crew down the rabbit hole looking for the best racing oils that actually … Read more

Conventional motor oil still earns its place in the garage, even with synthetics dominating the conversation. After 30 days of drain-oil inspections, viscosity tests, and cold-start comparisons across nine different conventional formulas, our team landed on a clear shortlist of bottles that consistently protect engines without the premium markup. This guide breaks down the best … Read more

Finding the best synthetic blend oils for can save you money while still protecting your engine better than conventional motor oil. After testing eight popular semi-synthetic oils over three months on a mix of daily drivers, high-mileage trucks, and older classics, our team has clear recommendations that fit nearly any garage. Synthetic blend motor oil … Read more

If your transmission shudders at 35 mph, hesitates on the 2-3 upshift, or feels sluggish in cold weather, the fluid inside is usually the reason. After 50,000 miles the original additive package starts breaking down, and by 75,000 miles most cars benefit from a fresh drain-and-fill. Picking the right bottle is where things go sideways: … Read more

Your continuously variable transmission depends on a very specific kind of lubricant, and picking the best CVT transmission fluids is not the same as grabbing any bottle of ATF off the shelf. I learned that the hard way on a 2014 Nissan Altima that shuddered at every stoplight until a proper NS-2 spec drain-and-fill turned … Read more

If your transmission shudders at 45 mph, slams into third gear, or whines on cold mornings, the fluid inside is probably overdue for a change. After 90 days of testing in a 2014 Chevy Silverado, a 2018 GMC Acadia, and a high-mileage 2007 Cadillac Escalade, our team narrowed down the 10 best Dexron transmission fluids … Read more

Choosing the best gear oils for your differential, manual transmission, or transfer case is one of those maintenance decisions that quietly saves you thousands of dollars. The wrong viscosity grade, or a budget oil with weak extreme-pressure additives, can leave you with a whining rear diff, chewed synchros, or a repair bill that runs into … Read more

I have spent more weekends than I care to count under pickup trucks and Jeeps, swapping fluids and chasing down chattering differentials. Synthetic gear oil is one of those upgrades that quietly pays for itself: better cold-weather shifts, longer drain intervals, and real protection for ring-and-pinion gears that cost thousands to replace. After testing these … Read more