I had a stupid conversation with Gemini last week:
Q: Should I sell my two cars and buy one car to replace them
A: Yes, that would be smart, because you will save on insurance and maintenance, and avoid future deprecation.
Q: Compare the depreciation of the new car with my cars now
A: A new car will depreciate 15-20% the first year. You current cars have basically stopped depreciating, so bottom line, you would be better off in terms of depreciation, but that ignores the maintenance expense.
Q: So, can spend something like 5k a year on maintenance and still come out ahead.
A: Yes, the new car will lose 9K in value in year 1, and 5k in year, so yes, you could have a high bill and still come out ahead. The best plan would be to hold on to your car until you have a major repair that exceeds its value.
Q: But if the transmission goes out, I can fix that, and then I have a pretty good car again:
A: Yes, since that is the weak point in your car, it would be unlikely to have any other major repairs, so that would be a smart move to get another 5 years of life out of it.
None of this is intelligent IMO. Itâs just a better search engine that is constructing the best fit response for my question.
I find claude actually pretty good at planning stuff like this. Itâs not perfect, I often pick at things and it revises itâs recommendations. But itâs great for sorting through options.
Sure, and itâs doing something valuable, but if you separated out the grunt work from the intelligent thought in the process, how would you split that?
The problem is when you mistake the tool for actual intelligence. A non financially savvy person could get terrible advice. Would you go into a discussion to ask a question and then go with the first response someone else makes?
These are the answers I get with the default free LLMs. Sonnet seems like the most convenient since it jumps into follow-up questions with that can be answered with a tap.
GPT
That depends on why you have two cars and what tradeoffs youâre willing to make. A single > car can save money, but it also reduces flexibility.
Here are the main factors to consider:
Selling both and buying one makes sense if:
You rarely drive both vehicles.
You work from home or your household can coordinate around one car.
One of the cars is expensive to maintain or insure.
Youâre looking to reduce monthly expenses.
Youâd rather own one newer, more reliable vehicle than two older ones.
Potential savings include:
One insurance policy instead of two (though the remaining carâs premium may be higher).
One registration and inspection.
Half the routine maintenance (oil changes, tires, brakes, etc.).
Less depreciation across multiple vehicles.
Keeping two cars makes sense if:
Two people frequently need to drive at the same time.
One vehicle serves a specialized purpose (truck for hauling, sports car for enjoyment, off-road vehicle, etc.).
Both cars are paid off and inexpensive to own.
Having a backup vehicle is valuable if one needs repairs.
Questions to ask yourself
How many days each month is the second car actually driven?
What does each car cost annually (insurance, registration, maintenance, repairs)?
What are both cars worth if sold today?
Would one replacement vehicle meet 95% of your needs?
Would eliminating one payment or maintenance burden improve your finances?
A simple rule
If the second car spends most of its time parked and costs several thousand dollars a year to own, consolidating into one reliable vehicle is often a financially sound decision.
If you tell me:
the year, make, model, mileage, and approximate value of both cars,
whether theyâre paid off or financed,
and what youâd want in the replacement vehicle,
I can help you estimate the financial impact and whether selling both is likely to leave you better off.
Gemini
Whether you should consolidate from two cars down to one depends entirely on how your daily routine, finances, and logistics shake out. It can save you thousands of dollars a year, but only if it doesnât create daily scheduling chaos.
Here is a quick framework to help you figure out if making the switch is the right move for you.
1. The Logistics Test (The âCan You Actually Do It?â Check)
Before looking at the math, look at your calendar. Getting rid of a vehicle works beautifully if:
Your schedules align: You and anyone else sharing the cars have similar commute times, work from home, or use public transit.
You have back-up options: If the remaining car is in the shop or one person has an emergency, you have easy access to rideshares, trains, buses, or a bike.
Your cargo needs overlap: One versatile car (like a compact SUV or a spacious hatchback) can handle the grocery runs, road trips, or commuting that the two separate cars used to split.
If you frequently find yourself needing to be in two different places at the exact same time with no public transit options, keeping both is likely worth the peace of mind.
2. The Financial Reality
Car ownership has a massive trail of hidden costs. Even if both of your current cars are paid off, keeping a second vehicle parked in the driveway costs more than most people realize.
Expenses Disappearing with Car #2
New Expenses to Factor in with Car #1
Insurance: No more paying a second premium (though you lose multi-car discounts).
A Higher Single Payment: If you finance the replacement car, you might have a new monthly bill.
Registration & Inspections: Annual government fees drop by half.
Increased Wear and Tear: The remaining car will accumulate miles twice as fast, meaning quicker turnarounds for tires, brakes, and oil changes.
Depreciation: You stop losing asset value on a machine that just sits there.
Rideshare Buffer: You will need to budget a little extra for the occasional Uber or Lyft when schedules conflict.
The Opportunity Cost: Selling two used cars in todayâs market could give you enough combined equity to buy a newer, more reliable, and more fuel-efficient single vehicle outrightâor leave you with a substantial chunk of cash left over.
3. How to Make the Transition Smooth
If you decide to go for it, the strategy of selling two to buy one requires a little sequencing:
Evaluate the trade-in value vs. private sale: Selling privately will get you the most cash for both vehicles, but trading them both in at a single dealership toward your replacement car is significantly less logistical hassle.
Target a âSwiss Army Knifeâ vehicle: Look for a replacement that bridges the gap between whatever roles your current two cars play (e.g., if you have a gas-guzzling truck and a tiny commuter coupe, a hybrid crossover might give you the perfect blend of utility and fuel economy).
Sonnet
Should I sell my two cars and buy one car to replace them?
Deliberated need for clarification before offering financial guidance
Deliberated need for clarification before offering financial guidance
This really depends on your situation. A few things determine whether this makes sense:
Reasons it could make sense:
Youâd save on insurance, registration, maintenance, and parking for a second vehicle
If both cars are older, consolidating into one newer, more reliable car reduces repair headaches
Less capital tied up in depreciating assets
Reasons it might not:
If two people in the household both need to commute separately, one car creates scheduling conflicts
Selling both to buy one often means a real cash outlay (used cars sell for less than replacement value)
You lose backup/redundancy if one car is in the shop
To give you something useful rather than generic, itâd help to know a bit more about your situation.
Also, I have a little trick I recommend. The trick is you donât feel bad about using Lyft. Specifically, you promise yourself that whenever you are in one place, and the car is in another place, you use a Lyft or Delivery or whatever, and have no regrets about it.
This is important, because if you are a cheap-actuary like me, youâll find yourself with no car, but wanting to do something stupid-- like visit a bar on the opposite side of town. And you know the ride costs more money than it worth-- say $60, so you donât do it. And then you donât like your new 1-car life because it feels like you are less free.
But, if you just do it with no regrets. Then you will save money in the long run, because all those stupid trips donât add up to the money you were spending on owning car b. (Obviously you need to do some math to verify that, but thatâs the basic argument)
I am cheap in that my cars are old. But they sit in a garage and stay in good shape, and I donât drive much, so the miles are low. I am not cheap in that I have two, just for me. This just means an extra $900 a year for insurance, an extra $150 synthetic annual oil change, and minimal depreciation. A cheap outcome is that by owning two cars, I can get annoyed or bored with one, and just drive the other that day, and that relaxes any real urge to go buy something new.
I have a few neighbors that proudly display their boats/RVs in their driveways several time throughout the summer. I look at them and think âthat would be fun to own, exactly once.â
The rest of the year, I would think about how I need to find time to get my moneyâs worth out of it. Put in a lot of effort to drag this thing several hours down the road, to sit in a chair in nearly the same weather that exists 30 feet away from me now, near a bunch of strangers that are <50 away doing the same thing.
All I really need is to buy some charcoal, burn some hamburgers on a grill, and piss in the woods behind my house after drinking a few beers. Much less effort, and when the weather sucks, I can just go inside.
Ah, a corporation. We have those here.
Honestly, I donât like to work extra when on vacation. Set up, tear down, make sure everything is packed evenly-weighted, etc.
But, it wouldnât be for me. Iâm not the market.
I was thinking more about someone renting someone elseâs personal RV.
