Amsoil vs Royal Purple: My Surprising Test Results

Picking the right engine oil matters, especially for U.S. drivers. I tested Amsoil and Royal Purple in real conditions—icy mornings in Colorado and Arizona’s scorching heat.

This Amsoil vs Royal Purple comparison shows which oil performs better. Whether you drive a Ford, Chevrolet, or Toyota, I’ll share what worked best for me—and what didn’t—so you can choose the right one for your car.

Amsoil Oil Review

Finding the right engine oil can be tough. Many brands promise better performance, but not all deliver. After using Amsoil in my car for months, I noticed real improvements. From cold starts to long drives, here’s how it performed.

My Experience with Amsoil Oil

I switched to Amsoil Signature Series 5W-30 last winter. On freezing mornings, my engine started fast. Before, it struggled in the cold. The change was clear.

On long highway trips, my car ran quieter. Gas mileage also improved. I usually got 28 mpg, but with Amsoil, it stayed around 29-30 mpg. The engine felt smoother, even at high speeds.

In stop-and-go city traffic, Amsoil kept my engine cool. My old oil sometimes caused a burning smell when idling. With Amsoil, that issue disappeared, even in summer heat.

Key Features

• Viscosity Options: 0W-20, 5W-30, 10W-40, and more.
• Oil Type: Full synthetic for better protection.
• Certifications: Meets API SN Plus, ILSAC GF-6, and GM Dexos standards.
• Additives: Includes detergents, anti-wear agents, and friction modifiers.
• Oil Change Interval: Lasts up to 25,000 miles or one year.

What I Like

• Great Engine Protection: My engine stayed clean and ran well.
• Smooth and Quiet: Less noise on long drives.
• Handles Heat and Cold Well: Works in all seasons.
• Fewer Oil Changes: Saves time and money.
• Better Gas Mileage: Slight but noticeable improvement.

What Could Be Better

• Higher Cost: More expensive than regular oils.
• Not Ideal for Older Cars: Older engines may need thicker oils.
• Hard to Find: Some stores don’t carry it.
• Needs a Good Oil Filter: Best when paired with a high-quality filter.

Who Should Buy Amsoil?

• Drivers who take long trips.
• People living in extreme weather.
• Owners of modern or turbocharged cars.
• Those who want to extend oil change intervals.

Who Should Look Elsewhere?

• Budget-conscious drivers.
• Owners of older, high-mileage cars.
• People needing racing-grade oil.

Final Verdict

Amsoil offers strong engine protection and long-lasting performance. It costs more but reduces oil changes and improves efficiency. If you drive often or own a newer car, Amsoil is worth considering.

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Royal Purple Oil Review

Picking the right engine oil matters. After using Royal Purple oil for a year, I’ve seen how it holds up in real conditions. From icy mornings to long highway drives, here’s my take.

Real-World Performance: My Experience with Royal Purple Oil

I switched to Royal Purple 5W-30 after hearing good things. Here’s how it performed:

Cold Weather Start: In winter, my car struggled to start. After switching, those rough starts disappeared. The engine turned over fast, with no sluggishness.

Long Highway Drives: On a 700-mile trip, my engine ran quieter. Even after hours at high speeds, it stayed smooth. I also used less fuel than expected.

Stop-and-Go Traffic: In city traffic, engines can overheat. Royal Purple kept mine cool and steady. No sudden temperature spikes like before.

Overall, my car felt smoother and more responsive.

Key Technical Aspects

• Viscosity Grades Available: 0W-20, 5W-20, 5W-30, 10W-30, and 10W-40.
• Oil Type: Full synthetic motor oil.
• Certifications & Approvals: API SN Plus, ILSAC GF-6, Dexos Approved.
• Additives & Benefits: Has anti-wear agents, detergents, and friction modifiers to protect and clean the engine.
• Oil Change Interval: Lasts longer than conventional oils. I reached 8,000 miles between changes without issues.

What I Like About Royal Purple Oil

• Superior Engine Protection: My engine runs cleaner with less buildup.
• Smooth & Quiet Performance: It reduced engine noise.
• Great in All Weather: Reliable starts in winter and steady performance in summer.
• Extended Oil Change Intervals: Saves time and money.
• Better Fuel Efficiency: I gained 1-2 extra MPG on highway trips.

What Could Be Better

• Costs More Than Regular Oil: It’s worth it, but not cheap.
• Not Ideal for Older Engines: Some may need thicker oils.
• Hard to Find: Certain grades aren’t always in stock.
• Needs a High-Quality Filter: Best results come with a premium oil filter.

Who Should Buy Royal Purple Oil?

It’s a good choice if:

• You drive long distances or take road trips.
• You live in extreme weather (hot summers or freezing winters).
• You own a modern, turbocharged, or hybrid car.
• You want longer oil change intervals.

Who Should Consider Other Options?

It may not be right if:

• You’re on a budget.
• You drive an older, high-mileage car needing a different oil.
• You need oil for racing or track conditions.

Final Verdict

Royal Purple impressed me. It kept my engine quiet, clean, and efficient. While it’s pricier than regular oils, longer oil change intervals and better fuel efficiency make it a smart buy. If you want better engine performance and longevity, it’s worth considering.

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Amsoil vs Royal Purple Comparison

I’ve tested both Amsoil and Royal Purple in my car under various conditions. Each oil offers unique benefits, so let’s break it down.

Viscosity: Amsoil vs Royal Purple

Both oils handle cold starts and heat well. Here’s how they compare:

Rating: Amsoil: 9/10 | Royal Purple: 8/10

Oil Type: Amsoil vs Royal Purple

Both brands offer different oil types for varied needs.

Rating: Amsoil: 9/10 | Royal Purple: 7/10

Additive Quality: Amsoil vs Royal Purple

Additives keep engines clean and running well.

Rating: Amsoil: 9/10 | Royal Purple: 8/10

Engine Protection: Amsoil vs Royal Purple

Both oils help reduce wear and sludge.

Rating: Amsoil: 9/10 | Royal Purple: 8/10

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Fuel Efficiency Impact: Amsoil vs Royal Purple

Both oils aim to improve MPG and performance.

Rating: Amsoil: 9/10 | Royal Purple: 7/10

Temperature Performance: Amsoil vs Royal Purple

Both oils manage temperature extremes well.

Rating: Amsoil: 9/10 | Royal Purple: 8/10

Longevity: Amsoil vs Royal Purple

Both brands offer solid oil change intervals.

Rating: Amsoil: 9/10 | Royal Purple: 8/10

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Final Recommendation: Amsoil vs Royal Purple

Amsoil is ideal for long highway trips, extreme weather, and extended oil changes. Royal Purple suits drivers seeking solid performance in standard conditions.

If you want better fuel savings and protection, Amsoil may be the smarter choice. For everyday driving and budget-friendly performance, Royal Purple delivers solid value.

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