April 26, 20178 yr Good moring. What weight oil should I use in the 1800 Brat for the summer in Texas 155,000 miles.I always use castrol syntec. Thank you and have an awesome day everyone.
April 26, 20178 yr 10w30 is fine.Or look at the user manual and use what the engineers at Subaru suggest.
April 26, 20178 yr I use 10W 40 all year round... 30 is probably a little light... especially with the increased temps you probably see in Texas
April 27, 20178 yr Author Thank you everyone. I was w/o my manual at work. I think 10-40 it is. Thank again
April 28, 20178 yr 10w-40 or 10-30 is what the comp said when i worked at a lube shop, i run delo15w-40 in my er27, and ive known a few people to run that in ea81's and ea82's. i think 10-30 is light unless its cold or you just rebuilt it and it has tight tolerences.
April 28, 20178 yr Castrol GTX 20-50 in the summer for me the last 30+ years. 10-40 in the winter. I guess if I had something really fresh and tight, I might go thinner, but never owned anything really with less than 100k miles. I know synthetic is superior, and will go for a lot more miles, but I just can't stand to run dirty oil in my engines. When it starts getting dirty, about 4k, I change it. Synthetic, for my usage, is not worth the extra cost. Maybe for much higher horsepower? Since I've used Castrol, I've never had a bearing or piston failure of any kind, EVER! My EJ22 daily driver has almost 500k hard miles, puling trailers, etc. I have a lead foot and drive aggressively. That engine has never been apart, and still has 180 psi compression in all 4 cylinders... I don't know how I could give a better testimonial. Be aware that some recommendations, even from the factory, are influenced by factors other than what is best for engine longevity. The trend toward thinner oils is MOSTLY just to get better mileage ratings. The increased oil change intervals are pretty much all about less cents-per-mile. Which is how many cars are rated by Consumer reports, etc. and what fleet buyers base their decisions on. I was told this by a Subaru factory rep. Of course, oils ARE much better now than in the past, and you CAN get away with less frequent changes. But I think I'll stick to my program boys, thank you.
April 29, 20178 yr Author I try to change the synthetic oil at 3-4000 miles. I prefer synthetic in case I dont make the time to change it until 5000 miles
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