Whatever You Drive. Wherever You Go.

I’m not selling oil — I’m protecting the machines that take you places. Independent AMSOIL dealer shipping across the U.S. and Canada.

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Application matters. Find the AMSOIL Signature Series recommendation built for what you actually drive, ride, or run.

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Real People, Not a Call Center

We’re Josh and Becky — Mill City Synthetics is a real, family-run AMSOIL dealership based in Woodbury, MN. When you text SPEC to (651) 300-2010, you’re talking directly to us, not a script. We’ve helped 300+ customers across the Twin Cities and beyond get the right AMSOIL product for their actual application — no upsells, no guessing, and we’ll never contradict what your owner’s manual says. Application matters, and so does who you’re doing business with.

29 five-star Google reviews and counting.

Partners & Affiliates:

Minnesota Adventure Trails Tread Lightly Invisible Wounds Project ADV Anonymous
Josh and Becky Friesen, owners of Mill City Synthetics, smiling outdoors with red rock formations in the background

Why Choose Mill City Synthetics?

Family-Run, Enthusiast-Driven

Mill City Synthetics is a family-run dealership — you deal directly with Josh and Becky, not a call center.

Family-Run for Personal Touch

You get a real person — Josh or Becky, not a call center. We respond within the hour.

Family-Run & Enthusiast-Owned

Quality Synthetic Products

Explore our premium offerings today!

Signature Series 0W-20 Motor OilSignature Series 0W-20 Motor OilShop NowSevere Gear 75W-90 Gear LubeSevere Gear 75W-90 Gear LubeShop NowP.i. Performance ImproverP.i. Performance ImproverShop NowHigh-Mileage 5W-30 Motor OilHigh-Mileage 5W-30 Motor OilShop NowMulti-Vehicle Synthetic ATFMulti-Vehicle Synthetic ATFShop NowQuickshot Gas TreatmentQuickshot Gas TreatmentShop NowSignature Series 5W-20 Motor OilSignature Series 5W-20 Motor OilShop NowSignature Series 5W-30 Motor OilSignature Series 5W-30 Motor OilShop Now

What Our Customers Are Saying

29+ five-star Google reviews from real Mill City Synthetics customers — and every oil sample we send out gets independently lab-tested.

AMSOIL Calculators & Tools

Dial in exact numbers for your ride — oil change intervals, 2-stroke mix ratios, and fuel additive treat ratios, straight from AMSOIL’s published specs.

Oil Change Interval

Find the right drain interval for your engine and AMSOIL product.

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2-Stroke Oil Mix

Get the exact oil-to-gas ratio for SABER, DOMINATOR, INTERCEPTOR, and more.

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Fuel Additive Ratio

Know exactly how much P.i., Quickshot, or Diesel All-In-One to add.

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Got a Question About Your Rig?

Tell us what you drive and we’ll tell you exactly what it needs. The fastest way to reach us is text: (651) 300-2010 — we respond within the hour.

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