Prestone AS658P All Season 3-in-1 Windshield Washer Fluid
Priced as of May 21, 2026
4.6(1,954 ratings)Buy on AmazonSaved to your guest loadout. Sign up to also save to your Cabinet (consumables) or Kit (tools you own).
As an Amazon Associate and affiliate partner, CarCareTruth earns from qualifying purchases. Full disclosure
Prices may varySerious hazard — read before use
The manufacturer's Safety Data Sheet classifies this product with one or more GHS Category 1 health hazards — the most severe tier. The wording below is taken directly from the SDS as required by OSHA's Hazard Communication Standard.
- H301 “Toxic if swallowed.”
Toxic if swallowed. Do not store near food or beverages. Hands-clean before eating.
- H311 “Toxic in contact with skin.”
Toxic absorbed through skin. Gloves and long sleeves recommended; rinse splashes immediately.
- H331 “Toxic if inhaled.”
Toxic by inhalation. Use outdoors or with a respirator; never in an enclosed garage without ventilation.
If swallowed, inhaled, or splashed in eyes:
Do not induce vomiting. Call Poison Control immediately at 1-800-222-1222 (US, 24/7, free). Have the product container with you.
Store in original container, locked, out of reach of children and pets.
About this product's hazards. This product's Safety Data Sheet uses signal word danger. Read the manufacturer's SDS and follow all safety instructions before use. CarCareTruth ratings translate SDS data — they do not replace the SDS or substitute for a hazard assessment specific to your task.
CarCareTruth's Analysis
Last reviewed May 21, 2026
TL;DR Rated to −27°F — adequate for most of the continental US, though sibling SKUs reach deeper cold. The 3-in-1 positioning (de-icer plus bug wash plus a water-beading additive) is a genuine year-round versatility play, and the 4.6-star, 1,954-review community signal backs the cleaning claims. Health score is 1.0/10 — the lowest tier — due to a DANGER-class formula with serious handling hazards. Methanol-free alternatives exist for households where that matters.
What it is and how it performs
Prestone AS658P is a year-round, ready-to-use washer fluid rated to −27°F, putting it in the mid-tier for freeze protection — adequate for most US winters but a step shy of the deepest dedicated winter de-icers. The 3-in-1 positioning combines cold-crack protection, a bug-removal surfactant package (the alkaline pH 10.7–10.8 in SDS Section 9 confirms a real cleaning chemistry distinct from a pure de-icer), and a water-beading additive. The community signal is strong — 4.6 stars across 1,954 Amazon reviews, #11 in Windshield Washer Fluids — and supports the cleaning and year-round versatility claims. Not for sale in California.
Who should buy this — and who should skip it
Best for one-bottle daily drivers who don't want to swap between a winter de-icer and a summer bug wash and live in a climate where −27°F protection is enough. Skip it if you face routine sub-−30°F cold — the sibling AS250 de-icer at −34°F is the better cold-climate pick — or if your household has chemistry concerns, in which case alcohol-free formulas score significantly higher on health. Not available in California.
Safety and environmental impact
SDS 757 carries DANGER with H301 (oral toxicity), H311 (skin toxicity), H331 (inhalation toxicity), and H370 (single-exposure optic nerve and central nervous system damage). Methanol is the active solvent at 26–34% (SDS Section 15 Prop 65 disclosure). Proposition 65 applies. SDS Section 8 specifies splash-proof goggles and chemical-resistant gloves (butyl rubber or Viton); pour-fill is the main exposure point. Organic vapor cartridge respirators are explicitly NOT recommended for methanol vapor — supplied-air or SCBA only if exposure limits are exceeded. Drain-destined via stormwater; no aquatic H-codes in SDS Section 12 (methanol LC50 in fathead minnows is 29,400 mg/L — very low aquatic toxicity).
Frequently asked questions
What temperature does Prestone AS658P protect down to?▾
The product label and Amazon title state −27°F protection. SDS Section 9 lists a freeze/melting point below 28°F (below −33.3°C) for the higher-methanol industrial pack; the −27°F rating on the consumer label is the all-season figure. That puts it in the mid-tier for freeze protection — adequate for most of the continental US, but the sibling AS250 de-icer reaches −34°F if you face deeper cold.
What does '3-in-1' actually mean on Prestone AS658P?▾
Per the Amazon title and front-label imagery, the formula combines three functions: de-icing (methanol-based cold-crack protection), bug-wash (alkaline surfactant package — note the SDS §9 pH of 10.7–10.8, much higher than the AS250 de-icer's pH 5), and a water-beading additive. It is positioned as a year-round single-bottle alternative to the season-specific AS250 (winter) and Bug Wash (summer) siblings.
Does Prestone AS658P contain methanol?▾
Yes. SDS 757 (July 2020) lists methanol (CAS 67-56-1) at 15 to less than 35% by weight; the SDS Section 15 Proposition 65 disclosure narrows the actual concentration to 26–34%. Methanol is the active de-icing and cleaning solvent. The DANGER signal word and Proposition 65 warning on the label both stem from the methanol content. Ethylene glycol was removed from the formula in the 2020 reformulation.
Is Prestone AS658P available in California?▾
No. Section 1 of the SDS explicitly states the product is not for sale in California due to CARB consumer-product VOC restrictions on methanol. California residents should look for an alcohol-free or low-VOC washer fluid formulated for CARB-restricted markets.
What should I do if Prestone AS658P is ingested?▾
Methanol ingestion is a medical emergency. The SDS classifies this product as H301 (toxic if swallowed) and H370 (single-exposure organ toxicity — optic nerve and central nervous system). Contact Poison Control (1-800-222-1222 in the US) or emergency services immediately. Do not induce vomiting. Keep the product out of reach of children and pets, especially in the orange/yellow jug, which is visually similar to consumer beverages.
From the manufacturer
Marketing copy from Prestone, via Amazon. Not editorial.
- •manufacturer: Prestone
- •Item Trademark: PRESTONE
- •Item Category: Cleaning Agent
Weekly pick
One product, one safety verdict, every week. No spam.
Manufacturer videos
Manufacturer specifications
- Package Dimensions
- 11.65 x 7.24 x 3.82 inches; 8.02 Pounds
- Date First Available
- September 12, 2019
- Manufacturer
- Prestone
- ASIN
- B07G7BQCYH
- Best Sellers Rank
- See Top 100 in Automotive
- Item Form
- Liquid
- Scent
- Unscented
- Specific Uses For Product
- Windshield
- Surface Recommendation
- Window
- Special Features
- Streak Free
- Contains Liquid Contents?
- Yes
- Cleaning Agent Formulation
- Detergent
More from Prestone
More in Washer Fluid
Qwix Mix
Windshield Washer Fluid Concentrate
CCT 6.9 · DecentHealth 9.5
303 Products
Instant Windshield Washer Tablets
CCT 6.8 · DecentHealth 9.5
Sanco Industries
Aqua Charge Windshield Washer Ultra Concentrate
CCT 6.6 · DecentHealth 9.5
nextzett
Kristall Klar Washer Fluid Concentrate
CCT 6.5 · DecentHealth 5.0
As an Amazon Associate and affiliate partner, CarCareTruth earns from qualifying purchases. Full disclosure
Community
0 postsShare how you use this product
Drop a quick comment or post a full review with photos and a star rating.
Sign in to postNew here? Create a free account.
Top Amazon review
↗External — Amazon's most-helpful review for context.