E20 Petrol | Phase Separation, Ethanol %, Monsoon and RUSTED TANKS

Описание: Ethanol in petrol will kill your new car, E20 petrol attracts ants, E20 petrol is destroying fuel pumps - these claims are viral on social media.
In this part we discuss how phase separation happens, how much time does ethanol blended petrol take to separate into water and petrol.
We also see what chemical reactions happen inside the combustion chamber of your car. How much truth there is to tanks rusting claims.
Brazil has 40 years of experience with ethanol blended fuels.

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Video Chapters:
0:00 Intro: Petrol or Water?
0:29 Does ethanol react with petrol?
1:43 Checking ethanol percentage in regular petrol phase separation
4:05 Layers are phase separation of petrol
4:47 Higher ethanol blend has higher capacity to hold water before splitting?
5:27 Does petrol have an expiry date
6:37 What about petrol pump tanks?
8:00 How ethanol affects old cars and new
8:48 Should you worry about E20?


No chemical reaction; ethanol is a cosolvent; blends hold small water in solution and burn it harmlessly; pure petrol lets water pool. Bell Performance; CropWatch UNL
Water tolerance RISES with ethanol % E10 separates easiest; higher blends resist. E10 ~0.5% water (~3.8 tsp/gal) at 60F, less when colder. NREL 2016 humid-env study (ethanolrfa.org/file/1793); USPTO 8439984/8911517; PetroClear ~7000 ppm at 70F
Timing: constant heat+humidity, E10 took 3+ months to phase separate; petrol became unfit ~1 month BEFORE separation. NREL via Agri-Pulse; agri-pulse.com/articles/7540
Brazil: ethanol fuel since 1979; gasohol E18-27.5% (now E27) + E100 hydrous; flex-fuel since 2003 (~94% new cars); anhydrous blended at TERMINAL (not pipelines) + quality monitoring to prevent separation. SciELO "Brazilian experience with ethanol fuel"; HFW; Wikipedia
Monsoon real risk = water ingress into station underground tank; any fuel then contaminated; station housekeeping. India: BPCL Ratlam CM-convoy stall (heavy rain water in tank); Gujarat/TN/Kerala
dealers seeking ethanol-free fuel in monsoon. Deccan Herald (Ratlam)
Storage: E20 uses existing USTs (must stay dry); E100/high blends need dedicated tanks/pumps/seals (Gadkari E100 framework). Autopunditz; Minnesota Commerce; PetroClear
Tanks: 75% of car fuel tanks are multi-layer HDPE plastic; steel only in older/commercial/bikes. Corrosion needs phase separation to put water on metal; alcohol also loosens existing rust in old steel systems (solvent). Compliant cars use fluorinated (FKM) seals; old nitrile seals swell. IJIRSET; TotalEnergies; Vehicle HQ; USPTO 4440545; SciELO Brazil