Canola Oil · Cast Iron Cookware Seasoning & Oil
Wellsley Farms Canola Oil 96 fl. oz.
Edible oil is not a typical PFAS source.
Wellsley Farms Canola Oil is a refined food product with no surface coatings or treatments associated with PFAS. No special risk factors apply to the oil itself.
The better-graded swap
Lodge
Cast Iron Seasoning Spray
85/100 safety
Same rubric that flunked this product. The swap earned Excellent.
Still want this one anyway? Check the price on Amazon. We’d swap it.
Material
Refined canola oil
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
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What Wellsley Farms Canola Oil 96 fl. oz. is made of, ingredients and materials
Wellsley Farms Canola Oil is refined canola oil derived from rapeseed. Refinement removes naturally occurring compounds and impurities, leaving primarily triglycerides (fats) with trace amounts of vitamin E and other minor components. As a cooking oil rather than cookware, the hazard profile differs from ceramic, metal, or non-stick surfaces; the concern shifts to thermal stability and oxidation rather than leaching from coatings.
What’s concerning
No PFAS disclosure
No public statement from the brand about PFAS in this product.
Category baseline
The starting point for this type of product, before anything specific to this product is counted.
Thermal oxidation and breakdown products
Canola oil exposed to high heat or repeated reheating produces aldehydes and polymeric compounds associated with increased health concern. This is inherent to the oil, not a manufacturing defect, but use discipline reduces risk.
Rancidity and free radical formation
Over time and with improper storage, canola oil oxidizes and becomes rancid, generating peroxides and free radicals. No evidence that Wellsley Farms has inferior anti-oxidant content, but adequate storage is consumer responsibility.
GMO status and labeling transparency
Most North American canola is genetically modified; product labeling does not explicitly state GMO or non-GMO status. For consumers seeking non-GMO oil, this is an informational gap rather than a direct safety hazard.
What’s reassuring
Base material not linked to PFAS
The main material recorded for this product is not one associated with PFAS.
Pesticide residue
Refined canola oil undergoes extensive processing that removes most crop-residue contaminants. No recalls or contamination reports specific to Wellsley Farms canola oil for pesticide residues in public records.
Source, EPA ↗Solvent residues from refining
Commercial canola oil refining may use hexane extraction; residual solvent is required by FDA to fall below 30 ppm. No evidence that Wellsley Farms product exceeds regulatory limits, and refining processes are industry-standard.
How is this PFAS grade calculated?
The brand's record and disclosure
Wellsley Farms is Costco's house brand. No specific product recalls or chemical contamination incidents for this canola oil appear in public safety databases or CPSC records. The brand does not publicly disclose PFAS testing or mitigation statements for cooking oils. Costco has implemented some supplier standards but does not prominently advertise oil-specific certifications on this product.
How it compares in its category
Among refined canola oils, Wellsley Farms is a standard commodity product with no documented advantages or disadvantages over competitors like Wesson, Crisco, or store brands from other retailers. Canola oil generally has moderate smoke point (around 400F) compared to refined vegetable oils (450F) and avocado oil (520F), but higher than unrefined oils. Price positioning is competitive and typical for bulk retail.
If you buy it
Use for cooking at or below 400F to avoid thermal breakdown and oxidation; reheating oil multiple times increases risk of aldehydes and polymers. Store in a cool, dark place away from light and heat to slow rancidity. Discard if it smells off or develops a rancid odor, typically within 1-2 years of opening. Do not reuse for deep frying beyond 3-4 cycles.
What is not known about PFAS in this product?
- Basis
- Model estimate, 90% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- Canola Oil has made none
Formulations change between production runs, so check the current label. How we grade.
What are the PFAS-free alternatives to Wellsley Farms Canola Oil 96 fl. oz.?
- Organic waxes and oils blend
- We found no PFAS statement from the brand
- Oil rancidity and off-gassing
2 hazards checked on this product, all on its full breakdown.
- mineral oil and soy-based oil blend
- Aerosol inhalation (mineral oil mist)
3 hazards checked on this product, all on its full breakdown.
Cast Iron Ultimate Bundle
- cast iron, bare or seasoned with the brand
- We found no PFAS statement from the brand
- Iron leaching into food
2 hazards checked on this product, all on its full breakdown.
More cast iron cookware seasoning & oil grades
How we score, every product runs through the same public 0-100 rubric based on materials, coatings, brand disclosure, lab findings, and recalls. See the full methodology → Spotted a mistake? Report an error.