The key market mechanism is not oil per se, but a changing inflation pass-through. If a larger share of households is insulated from petrol volatility, the RBA’s reaction function becomes less sensitive to crude spikes over 1-3 months, which is supportive for duration and rate-sensitive equities even if headline fuel prices stay high. The immediate move can still be noisy because the non-EV fleet, freight, and air travel keep absorbing the first-round shock, so markets may front-run too much easing too early.

Competitive dynamics favor low-cost Chinese EV makers and the broader battery/value chain because they are the marginal enablers of adoption, while fuel retailers and legacy ICE-adjacent businesses face a slower burn of lower volumes and weaker station traffic over 6-18 months. In Australia, that is a more credible loser set than broad crude producers; the country is too small to change global oil balances, but it can absolutely change local retail fuel economics and used-ICE residual values. Credit is the second-order risk: faster EV penetration should reduce running-cost stress for new buyers, yet faster ICE depreciation can pressure auto-lender collateral and trade-in books.

Contrarian view: the consensus is probably overstating how fast one month of EV share translates into structural disinflation. Fleet turnover is slow, charging constraints remain a real bottleneck, and if petrol normalizes or subsidies fade, the adoption curve can flatten quickly. The thesis is falsified if the next 1-2 CPI prints still show transport inflation dominating services/wages, or if monthly EV share rolls over materially from the recent pace.