Mill City Synthetics

08/05/2026

08/04/2026

There's a new set of letters on the back of your oil bottle and almost nobody's talking about it.

It's called GF-7, and as of March 2026 it quietly became the new baseline for gasoline engine oil in this country. Tighter LSPI protection, tougher timing chain wear limits, better piston cleanliness — basically, the bar for "meets spec" just moved.

If you're running a newer turbo or direct-injection engine, this one's worth two minutes of your time.

Full breakdown → https://millcitysynthetics.com/gf-7-motor-oil-explained-2026-standard/

Application matters. Text SPEC to (651) 300-2010 if you want the short version for your specific rig.

GF-7 motor oil is the new 2026 baseline standard replacing GF-6. Here is what changed and whether your engine needs the upgrade.

07/29/2026

We’re set up at the Washington County Fair all week.
Look for the black AMSOIL canopies right outside Building A, next to the malt booth. The flags are hard to miss.

Come talk oil. Daily driver, diesel truck, side-by-side, sled, bike, boat, mower — whatever you run, bring the question. Application matters, and we’ll help you land on exactly what your machine actually needs. No pitch, no pressure.

We’ve got product on the shelf if you want to grab something while you’re there.

Fair runs through Sunday, Aug 2.

Washington County Fairgrounds — 12300 40th St N, Lake Elmo

Can’t make it out? Text SPEC to (651) 300-2010 and we’ll get you sorted.

07/29/2026

Quick heads up — AMSOIL's running a promo through 8/11: spend $100+ as a Preferred Customer or straight off the catalog, use code LOCK826 at checkout, and get a free AMSOIL padlock. No catch.

If you're already restocking Signature Series for the season, this is free money — lock up the gear box, trailer, shed, whatever needs it.

Not a PC yet? Sign up here and get member pricing on top of it: amsoil.com/?zo=30677946

Not sure what your rig actually needs? Text SPEC or call (651) 300-2010 — application matters.

Code: LOCK826 | Ends 8/11/26

07/24/2026

AMSOIL Preferred Customer membership gets you up to 25% off online retail pricing — closer to 30%+ off what you'd pay at a big-box store.

Same Signature Series. Same protection. Just a better price because you're buying direct as a member.

One membership. Full catalog access. Pays for itself fast if you're doing your own maintenance.

Text SPEC to (651) 300-2010 and I'll get you set up.

Or sign up directly here: https://www.amsoil.com/offers/pc/?zo=30677946

Josh | Mill City Synthetics

07/24/2026

If you're running a 3.5L EcoBoost, the answer should be AMSOIL Signature Series 5W-30.

Meets Ford WSS-M2C946-B1 spec. Up to 25,000 miles or one year between changes. Built for the heat and pressure a turbocharged engine puts on oil.

Application matters.

Drop your year and engine in the comments — let's see what you're running.

Josh | Mill City Synthetics

07/23/2026

AMSOIL oil filters are coming back. 🙌

One of AMSOIL's filter manufacturing partners unexpectedly shut down — and that ripple hit the whole market, not just AMSOIL. They've been working to qualify new vendors and get a new factory tooled up. That process is done.

I put together a full availability list by product code with projected dates as of July 22. Some are back now, some are first week of August, and a handful have temp supply or crossover options in the meantime.

If your filter is showing "Available Now" — you can order through me directly or shoot me a text and I'll get you sorted.

👉 Full list + what to do if yours isn't back yet — link in first comment.

📱 Text SPEC to (651) 300-2010

07/23/2026

Right now AMSOIL is giving away a free magnetic level with every $100+ order.

Use code 𝐋𝐄𝐕𝐄𝐋𝟕𝟐𝟔 at checkout — offer ends July 28.

If you've been sitting on an oil change or stocking up for the season, this is the time to do it. Spend on what your engine needs, get a solid shop tool for free.

👉 https://www.amsoil.com/?zo=30677946

Josh | Mill City Synthetics

07/21/2026

Two oils. Same Group IV base stock. Completely different protection.

That's what Part 4 of the How Motor Oil Is Made series is about — the additive package. It's the 5–30% of your oil that most people never think about, and it's the part that actually separates premium synthetic from budget synthetic.

Detergents. Dispersants. ZDDP. Antioxidants. VI improvers. Each one doing a specific job inside your engine. Link in the comments.

Link to the article in the comments👇

Josh | Mill City Synthetics

07/20/2026

The 3,000-mile oil change had a good run. So did Blockbuster.

Modern synthetics are engineered to last. Every major automaker has known this for over a decade — your owner's manual says it, the oil says it. The only thing still pushing 3k is the quick-lube shop that profits from it.

Full breakdown on the blog 👇
https://millcitysynthetics.com/the-last-time-3000-miles-made-sense-you-were-probably-renting-dvds/

— Josh | Mill City Synthetics