West Coast Ale I Yeast | Omega Yeast OYL-004
Omega OYL-004 West Coast Ale I Yeast for Clean, Hop-Forward American Ale Brewing
Omega Yeast OYL-004 West Coast Ale I is a classic clean American ale strain commonly associated with the Chico profile. It is a strong choice for brewers who want dependable attenuation, restrained fermentation character, and a neutral base that lets hops and malt lead. This strain fits naturally in pale ale, IPA, cream ale, stout, porter, and other American styles where clarity of recipe expression matters.
Based on Omega's published guidance and current technical references, this strain typically delivers 73% to 80% attenuation, low to medium flocculation, up to 11% ABV tolerance, and a recommended fermentation range of 60 to 73°F. It is also listed as non-phenolic, non-diastatic, and STA1 negative. Cooler fermentations can keep the profile especially clean, while warmer use still stays versatile and brewer-friendly.
What Omega OYL-004 Contributes to Beer
- Clean American ale profile: Keeps yeast character restrained so hop and malt balance stays clear
- Strong hop compatibility: A natural fit for pale ales and IPAs where varietal hop character should shine
- Reliable performance: Useful for core ale styles that need consistent, repeatable fermentation
- Broad style versatility: Works across both hop-forward and malt-supported American ales
Omega OYL-004 Specifications
- Attenuation: 73% to 80%
- Flocculation: Low to Medium
- Alcohol tolerance: up to 11% ABV
- Fermentation temperature: 60 to 73°F (16 to 23°C)
- Phenolic: No
- Diastatic: No
- STA1: Negative
Best Styles for OYL-004 West Coast Ale I
- American Pale Ale
- IPA
- Cream Ale
- American Stout
- Porter
Why Brewers Choose OYL-004
This strain is a go-to option when the goal is clean American fermentation with minimal distraction from the grist or hop bill. It is especially useful for brewers building reliable house pale ales, IPAs, and other staple American styles.
Liquid Yeast Storage and Shipping
We store liquid yeast in temperature-monitored refrigeration to help protect yeast health until shipment. Once in transit, weather and carrier handling are outside our control, so liquid yeast customers should choose shipping protection based on season, destination, and transit time.
Expedited shipping, insulated mailers, and ice packs can materially reduce risk for liquid yeast during warm-weather transit. Dry yeast is generally much less risky to ship than liquid yeast.
Related Yeast and Brewing Resources
Browse our full Omega Yeast collection for more clean American, seasonal, and specialty strains. You can also review our yeast shipping best practices page before ordering liquid yeast in warmer weather.
If you want a classic, dependable American ale strain that stays clean and hop-friendly, Omega OYL-004 West Coast Ale I is a strong choice.