AMSOIL Guides & Account Help | A1 Synthetic Oil

Maintenance & oil selection

How often should you change synthetic oil?
Set a synthetic oil change interval using your maintenance schedule, driving conditions, oil-life monitor, and the limits of your oil and filter.
Full synthetic oil change: oil, filter, and preparation guide
Prepare for a full synthetic oil change with the right specification, fill quantity, filter, supplies, and a plan for recycling the used oil.
Synthetic oil change cost: DIY vs. shop service
Compare a shop oil-change quote with a DIY budget: oil, filter, labor, shipping, tools, and disposal. Build the total for your own vehicle.
Choosing an oil filter for synthetic oil
Choose an oil filter by vehicle fitment, construction requirements, and service interval, then compare compatible products in the filter catalog.
Transmission fluid changes: selection, methods, and cost factors
Identify the correct transmission fluid, compare drain-and-fill and exchange services, and understand the parts and labor in a service quote.
Differential fluid changes: front, rear, and limited-slip
Identify axle specifications, choose gear oil, check limited-slip additive requirements, and prepare a differential fluid service shopping list.
Transfer case fluid change guide
Identify your transfer case, distinguish its fluid from axle and transmission oil, and prepare the correct parts and service information.
High-mileage oil changes: choosing the right oil
Decide whether a high-mileage motor oil fits your engine, while keeping the correct viscosity, specifications, filter, and maintenance interval.
Diesel oil change: specifications, capacity, and filters
Plan a diesel oil change using the engine specification, emissions requirements, service-fill capacity, correct filters, and actual duty cycle.
Harley-Davidson oil change: oils, filters, and kits
Match your Harley-Davidson model and engine to the correct oil, filter, and kit, and check whether primary and transmission service need separate supplies.
Understanding oil viscosity: what 5W-30 means
What the numbers in a grade like 5W-30 or 0W-20 describe, what they do not, and how to choose a viscosity your engine allows.
Full synthetic vs. synthetic blend vs. conventional oil
Compare full synthetic, synthetic blend, and conventional motor oil by application, specifications, cost, and service requirements.
Synthetic oil myths and facts
Common claims about synthetic oil, including leaks, switching back, break-in, and mixing, compared with how lubricants actually work.
Winter and summer vehicle maintenance
A seasonal checklist for oil, fluids, and storage, plus how cold starts, heat, towing, and short trips affect maintenance.
Used oil recycling and waste reduction
How oil choice and service intervals affect waste, and how to store and recycle used motor oil and filters properly.
Lubricants beyond the engine
Transmission fluid, gear oil, grease, brake fluid, and coolant: what each system needs and why the wrong fluid causes problems.
Oil for performance and racing engines
How lubricant needs change for turbocharged, modified, track, and competition engines, and when racing oil is and is not appropriate.
Robot reducer grease and lubrication: follow the maker’s spec
How harmonic, cycloidal (RV), and planetary robot reducers are lubricated, where to find the specified grease, and how to plan a robot grease change.
Air compressor oil: rotary screw and piston grades, intervals
Choose rotary screw or piston air compressor oil by design, ISO 32, 46, 68, or 100 grade, and the manual’s spec, then set the change interval by hours.
Industrial hydraulic oil: ISO 32, 46, and 68 for plant equipment
Select AW or multi-viscosity hydraulic oil for presses, injection molding, and lifts by ISO grade, seal compatibility, and cleanliness, then plan changeovers.
Industrial bearing grease for conveyors and gearmotors
Choose conveyor bearing and gearmotor grease by NLGI grade, thickener compatibility, base-oil viscosity, and food-grade H1 needs, and avoid over-greasing.
Industrial oil analysis: starting a plant program
Start an industrial oil analysis program for compressors, hydraulic units, and gearboxes: choose equipment, sample consistently, and trend the results.
AMR and AGV fleet maintenance: drive units, lifts, and fluids
Plan preventive maintenance for warehouse AMR and AGV fleets: drive units, wheels, lift mechanisms, and the forklifts and conveyors working alongside them.
Diesel generator oil: category, viscosity, and change interval
Choose diesel generator oil by the engine maker’s API category and viscosity, then change it by hours or calendar time for standby and prime-power duty.
Natural gas generator oil: ash level and oil analysis
Choose natural gas generator engine oil by ash level, viscosity, and the engine maker’s requirements, and use oil analysis to manage long run hours.
Generator diesel fuel storage: testing, water, and treatment
Keep standby generator diesel ready: drain water, test for contamination and microbial growth, treat for cold flow and stability, and record every check.
Diesel generator wet stacking and low-load operation
What wet stacking is, why lightly loaded diesel generators develop it, and how load testing and correct sizing help, with links to oil and fuel care.
Cold-weather generator starting: block heaters, coolant, oil
Keep standby generators ready to start in cold weather: block heater checks, coolant condition, oil viscosity for the climate, and diesel cold-flow treatment.
Generator oil analysis: sampling standby and prime engines
Use oil analysis on standby and prime-power generators to check wear, fuel dilution, coolant leaks, and oil condition between changes.
Generator maintenance schedule: weekly to annual checks
A standby generator maintenance checklist from weekly inspections to annual service: oil, coolant, fuel, batteries, filters, and testing under load.
Diesel fire pump engine maintenance: oil, fuel, and coolant
Maintain diesel fire pump engines with the listed engine’s oil, regular test runs, fuel and coolant care, and records that support your inspection program.
Cooling plant lubrication: pumps, fans, and tower gearboxes
Lubrication for data center and plant cooling equipment: pump and motor bearing grease, fan bearings, and cooling tower gearbox oil requirements.
Coastal and tropical generator maintenance: heat, salt, moisture
Maintain generators in coastal and tropical climates: corrosion control, moisture in oil and fuel, cooling-system care in heat, and storm readiness.
Lubricant supply planning for islands and remote sites
Plan oil, filter, coolant, and fuel-treatment stock for islands and remote sites using engine hours, resupply lead times, safe storage, and oil analysis.
Snowmobile oil: 2-stroke, 4-stroke and chaincase oil guide
Choose 2-stroke or 4-stroke snowmobile oil, chaincase oil and coolant for Ski-Doo, Polaris, Arctic Cat and Yamaha sleds, then prep for the season and storage.
Winter storage for boats, mowers and small engines
Prepare boats, outboards, mowers and handheld equipment for winter storage: fuel stabilizer, fogging, fresh oil, gear lube and corrosion protection.
Diesel gelling: gel point, anti-gel and how to prevent it
At what temperature diesel gels, how anti-gel additives work, how to fix gelled fuel, and the winter oil, coolant, DEF and block-heater checks for diesels.
2-stroke oil mix chart: 50:1 ratios, premix and injection
2-stroke oil mix chart in ounces per gallon and mL per litre for 24:1 to 100:1, plus which oil standard your chainsaw, outboard, dirt bike or sled needs.
Bypass oil filter guide: how bypass filtration works and kits
How a bypass oil filter works with the full-flow filter, EaBP filter service limits, and which AMSOIL bypass kit fits Ford, GM, Cummins and other diesels.
Engine oil analysis: used-oil testing for cars and trucks
How engine oil analysis works for a car, diesel pickup, motorcycle or machine: which mail-in kit to choose, how to take an oil sample, and how to read the report.
Oil and fluid specifications explained
What API, ILSAC, JASO, NMMA, ISO, NLGI, DOT, and OEM standards mean.

Guides & help.

Maintenance & oil selection

Shopping & account help

Let’s get you pointed
in the right direction.

Guides & help.

Maintenance & oil selection

Shopping & account help

Let’s get you pointedin the right direction.

Let’s get you pointed
in the right direction.